Smart Person Uses "Java"

Calculator dengan Java - NetBeans

2010-01-20T14:15:00.002+07:00

Bagi yang pengen membuat calculator dengan menggunakan bahasa java silahkan download sorce code nya disini:

http://www.ziddu.com/download/8242962/calculator.rar.html

Aplikasi ini dibuat dengan menggunakan NetBeans.
Selamat Berkreasi

Java and MySQL Store Prosedure Programming I

2010-01-16T10:25:00.002+07:00

Pada DBMS MySQL ada sebuah service dimana kita dapat membuat sebuah prosedur tersimpan di MySQL sendiri serta menjalankan prosedure tersebut kapan sesuai keinginan kita.

Ketika mata kuliah PBO. Aku sering mengamati dosen-dosen mengajarkan tentang koneksi Java ke MySQL. Dan pertanyaanku, mengapa sintaq SQL selalu diketik di list program java? mengapa tidak di tulis di MySQL sendiri?

Jadi kita bisa memisahkan pemrograman Java dan pemrograman MySQL sendiri-sendiri.

di atas adalah uraian singkat dari store prosedure.

*>>Ok. kita masuk ke MySQL. Bagaimana cara membuat sebuah store prosedure dengan parameter inputan.

CREATE PROCEDURE SP_InputBarang

(kd char(5),nama varchar(30),hrgbeli double,diskon double,

hrgprivate double,hrgjual double,stock int)

begin

insert into T_Barang values(kd,nama,hrgbeli,diskon,hrgprivate,

hrgjual,stock);

end

maksud sintaq SQL di atas:

create procedure [nama prosedur] ==> membuat prosedur

([nama parameter] [type variable]) ==> membuat parameter inputan

begin

[sintaq SQL, misal input,delete,atau kondisi]

end

silakan compile sintaq sql tersebut di MySQL anda.

*>> Selanjutnya kita buka netbeans. kalau belum punya bisa download di netbeas.org

Buatlah sebuah Form seperti pada gambar di bawah.

*>>pertama kita import libary jdbc MySQL.

masuk ke halaman source

setelah itu ketik pada awal program.

import java.sql.*;
import javax.swing.JOptionPane;

*>>lanjut......pada "Public F_input" silakan di ketik code di bawah.(F_Input adalah nama class yang kalian buat)

public F_input() {
initComponents();
try
{
//meload driver
Class.forName("com.mysql.jdbc.Driver");
//membuat koneksi
conn=DriverManager.getConnection("jdbc:mysql://locahost/db","root","");
}
catch(Exception e)
{
JOptionPane.showMessageDialog(null, e);
}
}

*>>Mari kita buat sebuah method dengan nama "masukan_data" seperti code di bawah.

void masukan_data(){
try{
CallableStatement sp_inputbarang =
conn.prepareCall("{call SP_InputBarang(?,?,?,?,?,?,?)}");
sp_inputbarang.setString(1, txtkodebarang.getText());
sp_inputbarang.setString(2, txtnama.getText());
sp_inputbarang.setDouble(3, Double.parseDouble(txthargabeli.getText()));
sp_inputbarang.setDouble(4, Double.parseDouble(txtdiskon.getText()));
sp_inputbarang.setDouble(5, Double.parseDouble(txthargaprivate.getText()));
sp_inputbarang.setDouble(6, Double.parseDouble(txthargajual.getText()));
sp_inputbarang.setInt(7, Integer.parseInt(txtstock.getText()));
sp_inputbarang.execute();
JOptionPane.showMessageDialog(null, "Simpan data berhasil");
}catch(Exception e){
JOptionPane.showMessageDialog(null, e);
}
}

*>> Buat Method Kosong untuk mengosongkan textField.

void kosong()
{
txtkodebarang.setText("");
txtnama.setText("");
txthargabeli.setText("");
txtdiskon.setText("");
txthargaprivate.setText("");
txthargajual.setText("");
txtstock.setText("");
}

*>> Klik Kanan pada textField Diskon-->Events-->Focus-->FocusLost. Dan Ketikkan code di bawah.

private void txtdiskonFocusLost(java.awt.event.FocusEvent evt) {
double hargabeli = Double.parseDouble(txthargabeli.getText());
double diskon = Double.parseDouble(txtdiskon.getText());
double hargaprivate = (hargabeli - (hargabeli * (diskon/100)));
txthargaprivate.setText(""+hargaprivate);
}

*>> Klik Kanan pada button Save-->Action-->ActionPerformed. Dan Ketik code di bawah.

private void btsaveActionPerformed(java.awt.event.ActionEvent evt) {
masukan_data();
kosong();
}

*>> Begitu juga pada button Cancel.

private void btcancelActionPerformed(java.awt.event.ActionEvent evt) {
kosong();
}

*>>Dan pada button Close.

private void btcloseActionPerformed(java.awt.event.ActionEvent evt) {
dispose();
}

untuk lebih jelasnya bisa download source code di sini.

cara penggunaan :

file mysql.sql di import dari SQLYog. (SQLYog bisa didownload di sini)
folder test_StoreProsedure open lewat Netbeans.

!!!---SELAMAT BEREKSPERIMEN---!!!

Sumber

GlassFish Project - Java Persistence Example

2009-03-12T00:30:00.002+07:00

Overview

This is a very simple example that uses only 2 entities - a Customer and an Order, with OneToMany relationships between them. The Customer and the Order classes are Plain Old Java Classes (POJOs). These classes, as well as the code that manipulates POJO instances, can be used without any changes in Java SE or Java EE environment.

Accessing an EntityManagerFactory and an EntityManager depends on the environment and is described in more details below.

We will create a customer and two related orders, find the customer, and navigate from the customer to its orders, and then merge and remove all the objects. All these operation will be performed using Java Persistence API and require JDK 5.0.

Click here to get the ZIP file with the complete Java SE example as a netbeans project. This example works with Java DB or with Oracle.

Click here to get the ZIP file with the complete Java SE example. This example works with Oracle.

Click here to get the ZIP file with the complete Java EE example.

Refer to Java Persistence API document of JSR-220: Enterprise JavaBeansTM 3.0 Specification for further details on annotations and APIs.

Check example sources for the necessary import statements.

Mapping to Existing Tables

In the first example we will use only two tables:

CUSTOMER

NAME

ORDER_TABLE

ORDER_ID

SHIPPING_ADDRESS

CUSTOMER_ID

CUSTOMER_ID column in the ORDER_TABLE is the Foreign Key (FK) to the ID column from the CUSTOMER table. The files sql/tables_oracle.sql and sql/tables_derby.sql in the example contains DDL to create both tables for Oracle and Apache Derby.

POJO Classes

Now let's look at the corresponding persistence classes. Both entities in this example use property based persistence. There is no access annotation element on the entity, so it defaults to access=PROPERTY. This is the reason why @Column annotation is specified for the get methods and not for the fields. The classes that are used as an argument or a return type between a remote client and a container must implement java.io.Serializable interface.
The POJO classes in the examples belong to an entity package.

Customer

The Customer entity is mapped to the CUSTOMER table, and looks like this:

@Entity
public class Customer {

  private int id;
  private String name;
  private Collection

 orders;

  @Id
  public int getId() {
      return id;
  }

  public void setId(int id) {
      this.id = id;
  }


  public

String

 getName() {
      return name;
  }

  public void setName(String

name

) {
      this.

name = name

;
  }


  @OneToMany(cascade=ALL, mappedBy="customer")
  public Collection getOrders() {
      return orders;
  }

  public void setOrders(Collection newValue) {
      this.orders = newValue;
  }

}

Note that there are no @Table and @Column annotations. This is possible because the persistence provider will use the default rules to calculate those values for you. See chapter 9 of the Java Persistence API Specification for detailed rules of the mapping annotations.

Order

The Order entity is mapped to the ORDER_TABLE table. It requires both @Table and @Column mapping annotations because table and column names do not match class and properties names exactly. @Column annotations are specified for the corresponding get methods:

@Entity
@Table(name="ORDER_TABLE")

public class Order {

  private int id;
  private String address;
  private Customer customer;

  @Id

@Column(name="ORDER_ID")

    public int getId() {
      return id;
  }

  public void setId(int id) {
      this.id = id;
  }

@Column(name="SHIPPING_ADDRESS")
public String getAddress

() {
      return

address

;
  }

  public void set

Address(String address

) {
      this.

address = address

;
  }


  @ManyToOne()
  @JoinColumn(name="CUSTOMER_ID")
  public Customer getCustomer

() {
      return

customer

;
  }

  public void setCustomer

(Customer customer

) {
      this.

customer = customer

;
  }

}

Note that Customer and Order have bidirectional relationships between the entities.

Persisting POJO Entities

Now, let's create new instances, set up the relationships and persist all of them together using the CASCADE option that we set on the Customer entity. This code must be executed in a context of an active transaction.


  // Create new customer
  Customer customer0 = new Customer();
  customer0.setId(1);
  customer0.setName("Joe Smith");

  // Persist the customer
  em.persist(customer0);

  // Create 2 orders
  Order order1 = new Order();
  order1.setId(100);
  order1.setAddress("123 Main St. Anytown, USA");

  Order order2 = new Order();
  order2.setId(200);
  order2.setAddress("567 1st St. Random City, USA");

  // Associate orders with the customer.

Note that the association must be set on both sides of the relationship: on the customer side for the orders to be persisted when transaction commits, and on the order side because it is the owning side:

    customer0.getOrders().add(order1);
  order1.setCustomer(customer0);

  customer0.getOrders().add(order2);
  order2.setCustomer(customer0);

When this transaction commits, all three entities will be persisted in the database.

Query and Navigation

We'll use a new EntityManager to do the query, but will execute the query without an active transaction:

// Create new EntityManager
  em = emf.createEntityManager();

  Query q = em.createQuery("select c from Customer c where c.name = :name");
  q.setParameter("name", "Joe Smith");

Our query is supposed to return a single customer, so we will use the Query method getSingleResult() to execute the query. This method would throw an exception if there is no or more than one matching customers.



  Customer c = (Customer)q.getSingleResult();

Now let's verify that the orders were also created by navigating from the Customer.
You can print the orders, but we'll just check the size:

Collection orders = c.getOrders();
  if (orders == null || orders.size() != 2) {
      throw new RuntimeException("Unexpected number of orders: "
              + ((orders == null)? "null" : "" + orders.size()));
  }

Merge and Removal of Persistent Instances

To remove an instance, it must be managed by this EntityManager. The code below uses a customer 'c' that had been detached from its persistence context. Removal of the Customer also removes related orders because of the CASCADE option set on the corresponding relationship. This code must be executed in a context of an active transaction.

    // Merge the customer to the new persistence context
  Customer c0 = em.merge(c);

Note that merge() is not a void operation. It returns back a managed copy of the argument (and its related objects). Only this copy can be used for EntityManager operations.



  // Delete all records
  em.remove(c0);

Putting It All Together

Using in Java SE

First, we need to create an EntityManagerFactory that we will use in the example. An EntityManagerFactory is created once for each PersistentUnit. Persistent unit in this example is called "pu1".

   // Create EntityManagerFactory for persistent unit named "pu1"
 // to be used in this test
 emf = Persistence.createEntityManagerFactory("pu1");

For each business method in the example, a new EntityManager is created:

    // Create new EntityManager
  em = emf.createEntityManager();

If a transaction required, it is started:

    // Begin transaction
  em.getTransaction().begin();

And then the business logic is executed in a separate business method:

// Business logic
mybusinessmethod(...);

If transaction has been started it must be committed:

    // Commit the transaction
  em.getTransaction().commit();

And EntityManager should always be closed if it won't be used again:

    // Close this EntityManager
  em.close();

Java SE client code in this example is located in the class client.Client.

To run the test, you need to create META-INF/persistence.xml file in the classpath. Copy META-INF/persistence.xml.template file from the classes directory in the example to META-INF/persistence.xml and populate the values of the corresponding properties with the database settings that you are using. Note that persistence-unit name is set to "pu1" and all entity classes are explicitly listed.

Add your database driver and classes directory from the unzipped example to the classpath, load the tables into the database, then run:

java -javaagent:${glassfish.home}/lib/toplink-essentials-agent.jar client.Client

Using the Java SE Example in Netbeans

Download Netbeans 5.5 and install the bundle
Download and install Java DB/Derby if you plan on using Java DB/Derby instead of Oracle.
- Configure Netbeans to use Java DB/Derby by following the steps in this tutorial .
Install the JAVA SE Persistence Example project .

Configuring the JDBC driver

To configure the JDBC driver to be used when running the project, right-click on the project, select properties. Click on the libraries and then click on the 'Add JAR/Folder' button to add the jars for the JDBC driver being used. In the example below, the Java DB/Derby JDBC Client Driver is added.

Creating the tables

Scripts are provided to create the tables needed for the example for either Java DB/Derby or Oracle.

Note:If you are using Oracle, go to the runtime tab, click databases and then right click drivers to add the Oracle driver so that it can be used with the SQL Editor.

Create a connection to the database
- expand the drivers folder and right click on the Oracle or Java DB/Derby driver and create a connection to the database. For Java DB/Derby you can enter: jdbc:derby://localhost:1527/testDB;create=true and enter APP for the username and password.
If you are using Java DB/Derby and the server is not started, Select Tools->Java DB Database ->Start Java DB server
Open the appropriate sql script by typing Ctrl-O or selecting 'Open File' from the file menu. The SQL scripts are in the sql directory of the project.
Select the connection to use (for Java DB/Derby you can use jdbc:derby://localhost:1527/testDB;create=true [APP on APP] .
Click the Run SQL icon on the right of the Connection drop-down box. This will open the Connect dialog. Enter the password for your connection. . Click OK to connect and run the SQL script.

Configuring the persistence unit

To configure the persistence unit for the sample, click on source packages and then click on META-INF. Double click on persistence.xml. Your configuration should look like the following if you are using Java DB/Derby:

Running the project:

To run the the sample application. Right click on the project and select 'Run Project'.

Using in Java EE

In a Java EE container, the client code will not create an EntityManagerFactory - it is done by the container.

There are several option to get a hold of an EntityManager:

An EntityManagerFactory or an EntityManager can be injected by the container or looked up in JNDI.
An EntityManager instance can be acquired from an EntityManagerFactory via the corresponding API call.

Transaction boundaries depend on the EntityManager type:

A JTA EntityManager participates in the current JTA transaction that is either controlled by the container or by a user via javax.transaction.UserTransaction API.
A resource-local EntityManager uses the same Java Persistence API as in Java SE environment to control its transactions.

In our example a JTA EntityManager is injected by the container into the Session Bean:

    @PersistenceContext(unitName="pu1")
  private EntityManager em;

Transaction boundaries set to container-managed defaults.

The client code from the Java SE example is now divided between a Stateless Session Bean ejb.TestBean (implements ejb.Test remote business interface), which contains the business logic (i.e. exactly the same business methods as the Java SE client), and an application client client.AppClient that calls the corresponding methods and prints the output:

    // Persist all entities
  System.out.println("Inserting Customer and Orders... " + sb.testInsert());

  // Test query and navigation
  System.out.println("Verifying that all are inserted... " + sb.verifyInsert());

  // Get a detached instance
  Customer c = sb.findCustomer("Joe Smith");

  // Remove all entities
  System.out.println("Removing all... " + sb.testDelete(c));

  // Query the results
  System.out.println("Verifying that all are removed... " + sb.verifyDelete());

In the Java EE environment META-INF/persistence.xml does not need to list persistence classes, or the (if you use the default persistence provider). It should specify , if it does not use the default DataSource provided by the container. The example specifies jdbc/__default, which is the default for the Derby database, so that it is easy to replace with another name. Java EE example uses automatic table generation feature in GlassFish by setting required properties in the META-INF/persistence.xml.

To test the example, unzip it and deploy ex1-ee.ear file:


  ${glassfish.home}/bin/asadmin deploy --retrieve . ex1-ee.ear

Then execute the appclient script:

${glassfish.home}

/bin/appclient -client ./ex1-eeClient.jar -mainclass client.AppClient

The Result

This is the output (after several extra log messages) that will be printed:

Inserting Customer and Orders... OK
Verifying that all are inserted... OK
Removing all... OK
Verifying that all are removed... OK

Latest Jakarta News

2009-03-12T00:26:00.002+07:00

BluePrints Program

2009-03-05T00:29:00.002+07:00

Mock exam 1

2009-02-28T15:53:00.002+07:00

The sample test is modeled on the Sun Certification for JavaTM 2 Programmer exam. The test has 59 questions and needs to be executed in 2 hours. The real exam may be a little tougher than this. You need to score 36 correct answers to clear the real exam. The first 50 questions of the mock exam are valid for both 1.2 and 1.4 versions of the exam. The remaining 9 questions are only useful if you are taking the SCJP 1.2 exam. Please let me know if you find any issues with the test. The site also offers another mock exam.

Which declaration of the main method below would allow a class to be started as a standalone program. Select the one correct answer.

public static int main(char args[])

public static void main(String args[])

public static void MAIN(String args[])

public static void main(String args)

public static void main(char args[])

What all gets printed when the following code is compiled and run? Select the three correct answers.

  public class xyz {    
public static void main(String args[]) {
       for(int i = 0; i < 2; i++) {
          for(int j = 2; j>= 0; j--) {
             if(i == j) break;             
System.out.println("i=" + i + " j="+j);          
}       
}    
} 
}

i=0 j=0

i=0 j=1

i=0 j=2

i=1 j=0

i=1 j=1

i=1 j=2

i=2 j=0

i=2 j=1

i=2 j=2

What gets printed when the following code is compiled and run with the following command -

java test 2

Select the one correct answer.

  public class test {    
public static void main(String args[]) {        
Integer intObj=Integer.valueOf(args[args.length-1]);       
int i = intObj.intValue();         
if(args.length > 1)           
System.out.println(i);       
if(args.length > 0)          
System.out.println(i - 1);       
else           
System.out.println(i - 2);    
} 
}

test

test -1

In Java technology what expression can be used to represent number of elements in an array named arr ?

How would the number 5 be represented in hex using up-to four characters.

Which of the following is a Java keyword. Select the four correct answers.

extern

synchronized

volatile

friend

friendly

transient

this

then

Is the following statement true or false. The constructor of a class must not have a return type.

true

false

What is the number of bytes used by Java primitive long. Select the one correct answer.

The number of bytes is compiler dependent.

What is returned when the method substring(2, 4) is invoked on the string "example"? Include the answer in quotes as the result is of type String.

Which of the following is correct? Select the two correct answers.

The native keyword indicates that the method is implemented in another language like C/C++.

The only statements that can appear before an import statement in a Java file are comments.

The method definitions inside interfaces are public and abstract. They cannot be private or protected.

A class constructor may have public or protected keyword before them, nothing else.

What is the result of evaluating the expression 14 ^ 23. Select the one correct answer.

Which of the following are true. Select the one correct answers.

&& operator is used for short-circuited logical AND.

~ operator is the bit-wise XOR operator.

| operator is used to perform bitwise OR and also short-circuited logical OR.

The unsigned right shift operator in Java is >>.

Name the access modifier which when used with a method, makes it available to all the classes in the same package and to all the subclasses of the class.

Which of the following is true. Select the two correct answers.

A class that is abstract may not be instantiated.

The final keyword indicates that the body of a method is to be found elsewhere. The code is written in non-Java language, typically in C/C++.

A static variable indicates there is only one copy of that variable.

A method defined as private indicates that it is accessible to all other classes in the same package.

What all gets printed when the following program is compiled and run. Select the two correct answers.

  public class test {    
public static void main(String args[]) {        
int i, j=1;       
i = (j>1)?2:1;       

switch(i) {         
case 0:
System.out.println(0);
break;         
case 1:
System.out.println(1);         
case 2:
System.out.println(2);
break;         
case 3:
System.out.println(3);
break;       
}    
} 
}

What all gets printed when the following program is compiled and run. Select the one correct answer.

  public class test {    
public static void main(String args[]) {        
int i=0, j=2;       
do
{          
i=++i;          
j--;       
}
while(j>0);       
System.out.println(i);    
} 
}

The program does not compile because of statement "i=++i;"

What all gets printed when the following gets compiled and run. Select the three correct answers.

  public class test {     
public static void main(String args[]) {          
int i=1, j=1;         
try {             
i++;              
j--;             
if(i/j > 1)                 
i++;         
}         
catch(ArithmeticException e) {             
System.out.println(0);         
}         
catch(ArrayIndexOutOfBoundsException e) {             
System.out.println(1);         
}         
catch(Exception e) {             
System.out.println(2);         
}         
finally
{             
System.out.println(3);         
}         
System.out.println(4);      
} 
}

What all gets printed when the following gets compiled and run. Select the two correct answers.

  public class test {     
public static void main(String args[]) {          
int i=1, j=1;         
try {             
i++;              
j--;             
if(i == j)                 
i++;         
}         
catch(ArithmeticException e) {             
System.out.println(0);         
}         
catch(ArrayIndexOutOfBoundsException e) {             
System.out.println(1);         
}         
catch(Exception e) {             
System.out.println(2);         
}         
finally {             
System.out.println(3);         
}         
System.out.println(4);      
} 
}

What all gets printed when the following gets compiled and run. Select the two correct answers.

  public class test {     
public static void main(String args[]) {      
String s1 = "abc";     
String s2 = "abc";     
if(s1 == s2)         
System.out.println(1);     
else         
System.out.println(2);     
if(s1.equals(s2))         
System.out.println(3);     
else         
System.out.println(4);     
} 
}

What all gets printed when the following gets compiled and run. Select the two correct answers.

  public class test {     
public static void main(String args[]) {      
String s1 = "abc";     
String s2 = new String("abc");       
if(s1 == s2)         
System.out.println(1);     
else         
System.out.println(2);     
if(s1.equals(s2))         
System.out.println(3);     
else         
System.out.println(4);     
} 
}

Which of the following are legal array declarations. Select the three correct answers.

int i[5][];

int i[][];

int []i[];

int i[5][5];

int[][] a;

What is the range of values that can be specified for an int. Select the one correct answer.

The range of values is compiler dependent.

-231 to 231 - 1

-231-1 to 231

-215 to 215 - 1

-215-1 to 215

How can you ensure that the memory allocated by an object is freed. Select the one correct answer.

By invoking the free method on the object.

By calling system.gc() method.

By setting all references to the object to new values (say null).

Garbage collection cannot be forced. The programmer cannot force the JVM to free the memory used by an object.

What gets printed when the following code is compiled and run. Select the one correct answer.

  public class test {     
public static void main(String args[]) {      
int i = 1;     
do {         
i--;     
}
while (i > 2);     
System.out.println(i);     
} 
}

-1

Which of these is a legal definition of a method named m assuming it throws IOException, and returns void. Also assume that the method does not take any arguments. Select the one correct answer.

void m() throws IOException{}

void m() throw IOException{}

void m(void) throws IOException{}

m() throws IOException{}

void m() {} throws IOException

Which of the following are legal identifier names in Java. Select the two correct answers.

%abcd

$abcd

1abcd

package

_a_long_name

At what stage in the following method does the object initially referenced by s becomes available for garbage collection. Select the one correct answer.

  void method X()  {      
String r = new String("abc");     
String s = new String("abc");     
r = r+1; //1     
r = null; //2     
s = s + r; //3 
} //4

Before statement labeled 1

Before statement labeled 2

Before statement labeled 3

Before statement labeled 4

Never.

String s = new String("xyz");

Assuming the above declaration, which of the following statements would compile. Select the one correct answer.

s = 2 * s;

int i = s[0];

s = s + s;

s = s >> 2;

None of the above.

Which of the following statements related to Garbage Collection are correct. Select the two correct answers.

It is possible for a program to free memory at a given time.

Garbage Collection feature of Java ensures that the program never runs out of memory.

It is possible for a program to make an object available for Garbage Collection.

The finalize method of an object is invoked before garbage collection is performed on the object.

If a base class has a method defined as

void method() { }

Which of the following are legal prototypes in a derived class of this class. Select the two correct answers.

void method() { }

int method() { return 0;}

void method(int i) { }

private void method() { }

In which all cases does an exception gets generated. Select the two correct answers.

if((i == 0) || (j/i == 1))

if((i == 0) | (j/i == 1))

if((i != 0) && (j/i == 1))

if((i != 0) & (j/i == 1))

Which of the following statements are true. Select the two correct answers.

The wait method defined in the Thread class, can be used to convert a thread from Running state to Waiting state.

The wait(), notify(), and notifyAll() methods must be executed in synchronized code.

The notify() and notifyAll() methods can be used to signal and move waiting threads to ready-to-run state.

The Thread class is an abstract class.

Which keyword when applied on a method indicates that only one thread should execute the method at a time. Select the one correct answer.

transient

volatile

synchronized

native

static

final

What is the name of the Collection interface used to represent elements in a sequence (in a particular order). Select the one correct answer.

Collection

List

Which of these classes implement the Collection interface SortedMap. Select the one correct answers.

HashMap

Hashtable

TreeMap

HashSet

TreeSet

Vector

Which of the following are true about interfaces. Select the two correct answers.

Methods declared in interfaces are implicitly private.

Variables declared in interfaces are implicitly public, static, and final.

An interface can extend any number of interfaces.

The keyword implements indicate that an interface inherits from another.

Assume that class A extends class B, which extends class C. Also all the three classes implement the method test(). How can a method in a class A invoke the test() method defined in class C (without creating a new instance of class C). Select the one correct answer.

test();

super.test();

super.super.test();

::test();

C.test();

It is not possible to invoke test() method defined in C from a method in A.

What is the return type of method round(double d) defined in Math class.

What gets written on the screen when the following program is compiled and run. Select the one right answer.

  public class test {    
public static void main(String args[]) {     
int i;    
float  f = 2.3f;    
double d = 2.7;    
i = ((int)Math.ceil(f)) * ((int)Math.round(d));       
System.out.println(i);   
}
}

Is the following statement true or false. As the toString method is defined in the Object class, System.out.println can be used to print any object.

true

false

Which of these classes defined in java.io and used for file-handling are abstract. Select the two correct answers.

InputStream

PrintStream

Reader

FileInputStream

FileWriter

Name the collection interface used to represent collections that maintain unique elements.

What is the result of compiling and running the following program.

  public class test {    
public static void main(String args[]) {        
String str1="abc";       
String str2="def";       
String str3=str1.concat(str2);         
str1.concat(str2);       
System.out.println(str1);    
} 
}

abcabc

abcdef

defabc

abcdefdef

Select the one correct answer. The number of characters in an object of a class String is given by

The member variable called size

The member variable called length

The method size() returns the number of characters.

The method length() returns the number of characters.

Select the one correct answer. Which method defined in Integer class can be used to convert an Integer object to primitive int type.

valueOf

intValue

getInt

getInteger

Name the return type of method hashCode() defined in Object class, which is used to get the unique hash value of an Object.

Which of the following are correct. Select the one correct answer.

An import statement, if defined, must always be the first non-comment statement of the file.

private members are accessible to all classes in the same package.

An abstract class can be declared as final.

Local variables cannot be declared as static.

Name the keyword that makes a variable belong to a class, rather than being defined for each instance of the class. Select the one correct answer.

static

final

abstract

native

volatile

transient

Which of these are core interfaces in the collection framework. Select the one correct answer.

Tree

Stack

Queue

Array

LinkedList

Which of these statements are true. Select the two correct answers.

For each try block there must be at least one catch block defined.

A try block may be followed by any number of finally blocks.

A try block must be followed by at least one finally or catch block.

If both catch and finally blocks are defined, catch block must precede the finally block.

The remaining questions are related to AWT, event classes, and layout managers. These topics are not included in 1.4 version of the exam.

The default layout manager for a Frame is ...

FlowLayout

BorderLayout

GridLayout

GridBagLayout

CardLayout

Which of the following are valid adapter classes in Java. Select the two correct answers.

ComponentAdapter

ActionAdapter

AdjustmentAdapter

ItemAdapter

FocusAdapter

Which method defined in the EventObject class returns the Object that generated an event. The method should be given in the format - return_type method_name();

Which of the following object receives ActionEvent. Select the four correct answers.

List

Button

Choice

CheckBox

TextField

MenuItem

Name the class that may be used to create submenus in pull-down menus.

In which class is the wait() method defined. Select the one correct answer.

Applet

Runnable

Thread

Object

Which is the only layout manager that always honors the size of a component. Select the one correct answer.

FlowLayout

GridLayout

BorderLayout

CardLayout

GridBagLayout

Which of these are valid Event Listener interfaces. Select the two correct answers.

MouseMotionListener

WindowListener

DialogListener

PaintListener

Which abstract class is the super class of all menu-related classes.

Answers to Sample Test 1

b, c, f

d. Note that the program gets one command line argument - 2. args.length will get set to 1. So the condition if(args.length > 1) will fail, and the second check if(args.length > 0) will return true.

arr.length

Any of these is correct - 0x5, 0x05, 0X05, 0X5

b, c, f, g

"am"

a, c. Please note that b is not correct. A package statement may appear before an import statement. A class constructor may be declared private also. Hence d is incorrect.

protected

a, c

b, c

a, d, e

d, e

a, c

b, c

b, c, e

b, e . The option c is incorrect because a Java identifier name cannot begin with a digit.

c, d

a, c

b, d

b, c

b, c

long

a, c

c, d

a, e

Object getSource();

a, b, e, f

a, b

MenuComponent

Making Http Simple Server With Java

2009-02-20T00:16:00.000+07:00

Praktikum's task Network and Apparatus Mathematics moves secondly be make one http simple server at localhost. With utilize SocketServer's function, therefore gets to be made one server which will wait â€œpanggilanâ€ on port 80 (HTTP). And will send html's code while called.

SocketServer works in one looping that perpetual to wait marks sense connection to go to port 80 on localhost. There is 4 constructor on SocketServer for example:

public ServerSocket(int port) throws BindException, IOException
public ServerSocket(int port, int queueLength) throws BindException, IOException
public ServerSocket(int port, int queueLength, InetAddress bindAddress) throws IOException
public ServerSocket( ) throws IOException // Java 1.4

n Java, to make one server gets to be done by trick as follows:

One serverSocket a new one is made deep one given port (in this case port 80) utilizing constructor of one SocketServer.
Then serverSocket waits until mark sense coming connection through port has already is determined previous utilize accept's function().
Then depends from server type, well utilize getInputStream's function(), getOutputStream's function(), or both of ala function goes together to get input and output stream in order to gets communication with client.
Server and client gets communication / get interaction until its time hang up connection.
Server, Client or both hangs up connection
Server returns to to step 2 and waiting until marks sense succeeding connections.

And attachment source's following code that I takes from praktikum's module meagrely modifies to be able to qualify as one http server.

Serverku.java

Perusal and File Writing with Java

2009-02-20T00:03:00.000+07:00

A few days ago, my friend asks for to help her works PR its Programming. PR's problem terminologicals i am goodly difficult also, since I newbie in programming. Programming languages who may be utilized is C,C++, Java. And since i am java person, therefore I choose to utilize Java.hehe.. Since I really be intend to study Java language.

Problem PR is we make program who will read one input file “indata.txt”, one that meaty word which will at test do correspond to order, if accords therefore that diwrite will into one file “legalwords.txt”, conversely if incorrectly will at write into file “badwords.txt”. Among word one by another word in file “indata.txt” came to pieces by one tabulator, on my program, I utilize tabulator tab(\t). Order that is utilized for mengetest to say is

a. first syllable may not as numeral as.
b. say has less than 8 characters.
c. say just may lap over of letter (a..z, A..Z), number (0..9), atau simbol underscore(’_').

Since I newbie in Java,and was wonted utilizes it, requiring time rather long time to think up syntax syntax that is used. On progam I, its program path is as follows:

a. Make one BufferedReader for FileReader(”indata.txt”). Make PrintWritter for FileWriter legalwords.txt and badwords.txt.
b. Then by use of StringTokenizer to account word amount in file indata.txt.
c. After knows total token / says, therefore then with looping to check about word / token, what appropriate ruling or not.
d. Then afters is sorted, therefore word suitably at write goes to legalwords.txt, and unsuitably diwrite goes to badwords.txt

And this is result running programs my version:
1. Input File

2. Legal Words

3. Bad Words

On Compile NetBeans

And this following is source code programs what do I make. Its correction appeal if available fault.

DOWNLOAD

Tips Java : Getting Address's IP and Host Name

2009-02-19T23:35:00.002+07:00

Java provides InetAddress's function to get host's internet protocol address and also name a computer. host's internet protocol address and also name that is gotten don't cling to host's internet protocol address and name local computer only, but can also be utilized for mengecek host's internet protocol address and name at Internet, obviously by condition of computer we most link with Internet. This logistic purpose also relates hand in glove with setting DNS on computer that we utilizes.

Following is sample program that points out fungsionalitas that:

Make one project is Netbeans new

Add one JFrame Form

Provede with 2 tags, 2 numbers TextField (txtIPAddress dan txtNamaHost) and 3 Button (btnCheckIPAddress, btnCheckHostName dan btnCheckLokal). See example on pictured following:

Following code cannikin type on btnCheckHostName, event actionPerformed

private void btnCheckHostNameActionPerformed(java.awt.event.ActionEvent evt) {

try {

String strHostName = InetAddress.getByName(txtIPAddress.getText()).getHostName();

JOptionPane.showMessageDialog(null, "Host name dari IP Address '" + txtIPAddress.getText() +"' =
"+ strHostName);

} catch (UnknownHostException ex) {

JOptionPane.showMessageDialog(null, ex);

Logger.getLogger(frmIpAddress.class.getName()).log(Level.SEVERE, null, ex);

}

}

Do import library that needful (import java.net.InetAddress; import javax.swing.JOptionPane;)

Following code cannikin type on btnCheckIPAddress, event actionPerformed

private void btnCheckIPAddressActionPerformed(java.awt.event.ActionEvent evt) {

try {

String strIPAddress = InetAddress.getByName(txtHostName.getText()).getHostAddress() ;

JOptionPane.showMessageDialog(null, "Alamat IP dari '"+txtHostName.getText() +"' ="+ strIPAddress);

} catch (UnknownHostException ex) {

JOptionPane.showMessageDialog(null, ex);

Logger.getLogger(frmIpAddress.class.getName()).log(Level.SEVERE, null, ex);

}

}

Following code cannikin type on btnCheckLokal event actionPerformed

private void btnCheckLocalActionPerformed(java.awt.event.ActionEvent evt) {

try {

InetAddress AlamatInternet = InetAddress.getLocalHost();

JOptionPane.showMessageDialog(null, "Host name lokal : " +AlamatInternet.getHostName());

JOptionPane.showMessageDialog(null, "IP Address lokal : " +AlamatInternet.getHostAddress() );

} catch (UnknownHostException ex) {

JOptionPane.showMessageDialog(null, ex);

Logger.getLogger(frmIpAddress.class.getName()).log(Level.SEVERE, null, ex);

}

}

Save and runs application (SHIFT + F6). Insert IP Address and click on “Check Host Name” or insert host name and click “Check IP Address”. Check IP and Host Local don't need entry. Following is umpteen screenshot message one that performs:

This program not smart's ala detect entry what that internet protocol address or host name. To easy, I utilize 2 numbers TextField for example. On terapan's application, input IP Address or Host Name can thru get variable.

Creating an AJAX-Enabled Calendar Control

2009-02-16T00:08:00.003+07:00

Introduction
Go to any travel or event booking website and you'll find the same user interface for collecting date information: the Calendar. Providing such an interface in an ASP.NET application is a breeze, thanks to the built-in Calendar Web control. There are two downsides to ASP.NET's Calendar control: first, it is not very useful when selecting dates far into the future or past, as you can only navigate to the next or previous month; and, second, the Calendar does not use AJAX techniques, so each click, be it selecting a date or moving to the next or previous month, requires a full postback.

Mehmet Genc addressed this first shortcoming in Extending the Calendar Control's Date Navigation by showing how to add month and year drop-down lists. But Mehmet's article was written in 2004 and since then AJAX-enabled websites have become all the rage. I decided it was high time to update Mehmet's custom Calendar control to support AJAX. Specifically, I implemented the AJAX-enabled Calendar control as a User Control. The User Control renders a TextBox control that, when clicked, displays a Calendar control from which the user can select the date. Like with Mehmet's Calendar, users can quickly jump to a particular month or year by using two drop-down lists. And best of all, the user experience is very responsive.

First Things First: Ensuring Your Environment Supports ASP.NET AJAX
To use this AJAX-enabled Calendar control, make sure your development environment supports the ASP.NET AJAX framework. If you are using Visual Studio 2008, then this framework is already present. If, however, you are using Visual Studio 2005, then you need to download and install the ASP.NET AJAX framework from Microsoft's site, http://www.asp.net/ajax/. For more information on this process, refer to Scott Mitchell's article, AJAX Basics and Getting Started with Microsoft's ASP.NET AJAX Framework.

My AJAX-enabled Calendar control uses the UpdatePanel and PopupControlExtender controls. While the UpdatePanel is part of the framework's "Essential Components," the PopupControlExtender is part of the ASP.NET AJAX Control Toolkit, which is a separate download (even for Visual Studio 2008). If you check out the Control Toolkit samples you'll notice that there's an AJAX Calendar control in the Toolkit. I built my own AJAX-enabled Calendar control instead of using the one in the Control Toolkit because I wanted to add the month/year drop-down lists. Also, there have been a variety of display bugs with the Calendar control (see the AJAX Control Toolkit work item list). I invite you to try out mine and the AJAX Control Toolkit's Calendar and use the one that's best suited for your needs.

Getting Started with My AJAX-Enabled Calendar Control
The complete code for this User Control, along with a sample web page, is available at the end of this article. You should be able to open the folder as a website in either Visual Studio 2005 or Visual Studio 2008.

The Calendar is implemented in the CoolCalendar.ascx file as a User Control. Take a moment to examine the markup in this page. You'll find the following key controls:

1. The DateTextFrom TextBox
2. A RequiredFieldValidator named DateTextFromRequired
3. A Panel control
4. An UpdatePanel control
5. The month and year DropDownList controls
6. The Calendar control
7. An AJAX PopupControlExtender control

There are a few of these controls that warrant further discussion. Take note of the markup for the DateTextFrom TextBox control (item 1):

Note the onfocus="javascript:this.blur();".

This bit of client-side script ensures that whenever the user clicks on the DateTextFrom TextBox, focus is immediately taken away from the control. The idea here - as we'll see shortly - is that whenever the user focuses on the TextBox it is immediately taken away and the Calendar control is displayed. This forces the user to select a date from the calendar. If you remove the onfocus script, the user could enter the date into the TextBox via the keyboard. I find this option undesirable due to the possibility of user entry errors.

The RequiredFieldValidator (item 2) is used to optionally ensure that a date value has been supplied. The User Control contains a Boolean public property named DateTextRequired. Setting this value to True enables the RequiredFieldValidator; setting it to False disables it. By default, the RequiredFieldValidator is enabled.

The AJAX PopupControlExtender control pops up a particular Panel on the page in response to a certain client-side action. The Panel control (item 3) defines the region that is popped up, and includes the UpdatePanel (item 4), the month/year DropDownLists (item 5), and the Calendar control (item 6).

The final piece in the markup page is the PopupControlExtender control (item 7) and is configured to display the Panel (item 3) whenever the DateTextFrom TextBox receives focus. This behavior is dictated entirely through the PopupControlExtender control's properties, there's no need to write any JavaScript or code!

For more information on the PopupControlExtender see the PopupControlExtender Demonstration. Also check out Brian Smith's article

, Displaying Extended Details in a GridView Using an Ajax Pop-Up.

Examining the AJAX-Enabled Calendar Control's Code
The User Control's code-behind class defines a couple of properties and includes the code to populate the month/year DropDownLists and the user's interactions with the Calendar. The most important property is the DateTextFromValue, which sets or gets the selected date. This property simply reads and writes its value to the DateTextFrom TextBox.

 public string DateTextFromValue
{
 get { return DateTextFrom.Text; }
 set { DateTextFrom.Text = value; }
}

Note: The code available for download at the end of this article includes a VB and C# version of the User Control...

Two additional properties are defined for specifying whether the RequiredFieldValidator should be enabled (DateTextRequired) and the error message to display if the required date value is not supplied (DateTextRequiredText).

The month and year DropDownLists are populated by the Populate_MonthList and Populate_YearList methods, which are called on the first page visit. These methods were taken directly from Mehmet's article. Populate_MonthList returns a list of month names (January, February, ...) while Populate_YearList populates the DropDownList with years from 20 years ago to one year in the future.

When the month or year DropDownList is changed, a partial page postback occurs and the Set_Calendar method is executed. The Set_Calendar method sets the Calendar control's TodaysDate property to the first of the selected month/year.

 public void Set_Calendar(object Sender, EventArgs E)
{
 string theDate = drpCalMonth.SelectedItem.Value + " 1, " + drpCalYear.SelectedItem.Value;

 DateTime dtFoo;
 dtFoo = System.Convert.ToDateTime(theDate);

 Calendar1.TodaysDate = dtFoo;
}

Whenever the user selects a date within the Calendar, a partial page postback transpires and the Calendar's SelectionChanged event is fired. The Calendar1_SelectionChanged event handler calls the PopupControlExtender control's Commit method, passing in the Calendar's SelectedDate property. The net effect is that the Calendar popup disappears and the selected date is display in the TextBox.

 protected void Calendar1_SelectionChanged(object sender, EventArgs e)
{
 PopupControlExtender1.Commit(Calendar1.SelectedDate.ToShortDateString());
}

My AJAX-Enabled Calendar Web Control In Action
The download at the end of this article includes a simple demo page, TestCoolCalendar.aspx. The demo illustrates how to use the User Control's DateTextRequired and DateTextRequiredText properties to require a date and show a custom error message. In addition to the User Control, the TestCoolCalendar.aspx includes a Save button that, when clicked, displays the value selected from the Calendar control. This value is retrieved via the User Control's DateTextFromValue property.

Conclusion
In this article we saw how to use the ASP.NET AJAX framework's UpdatePanel and the AJAX Control Toolkit's PopupControlExtender to turn the built-in Calendar control into a richer, AJAX-enabled version. This control is implemented as a User Control, making it a cinch to add to your projects. Thanks again to Mehmet Genc for the initial inspiration and to Scott Mitchell for publishing this article.

Happy Programming!

Calculator modestly with Swing

2009-02-14T14:00:00.002+07:00

Swing is one of technology in Java to make one application desktop. This following I load one simple example with swing. One calculator plain. I utilize two numbers class. Class first is that of penampil frame and class second is program from that calculator is alone.

Its example following:

package testing;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

/**
*
* @author bagus
*/
public class SwingCalculator {
public static void main(String[] args) {
JFrame frame = new Calculator();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}

Then remakes one class at same package

package testing;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
/**
*
* @author bagus
*/
class Calculator extends JFrame {
private final Font BIGGER_FONT = new Font("monspaced", Font.PLAIN, 20);
private JTextField textfield;
private boolean number = true;
private String equalOp = "=";
private CalculatorOp op = new CalculatorOp();

public Calculator() {
textfield = new JTextField("0", 12);
textfield.setHorizontalAlignment(JTextField.RIGHT);
textfield.setFont(BIGGER_FONT);

ActionListener numberListener = new NumberListener();
String buttonOrder = "1234567890 ";
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(4, 4, 4, 4));
for (int i = 0; i < buttonOrder.length(); i++) {
String key = buttonOrder.substring(i, i+1);
if (key.equals(" ")) {
buttonPanel.add(new JLabel(""));
} else {
JButton button = new JButton(key);
button.addActionListener(numberListener);
button.setFont(BIGGER_FONT);
buttonPanel.add(button);
}
}
ActionListener operatorListener = new OperatorListener();
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(4, 4, 4, 4));
String[] opOrder = {"+", "-", "*", "/","=","C"};
for (int i = 0; i < opOrder.length; i++) {
JButton button = new JButton(opOrder[i]);
button.addActionListener(operatorListener);
button.setFont(BIGGER_FONT);
panel.add(button);
}
JPanel pan = new JPanel();
pan.setLayout(new BorderLayout(4, 4));
pan.add(textfield, BorderLayout.NORTH );
pan.add(buttonPanel , BorderLayout.CENTER);
pan.add(panel , BorderLayout.EAST );
this.setContentPane(pan);
this.pack();
this.setTitle("Calculator");
this.setResizable(false);
}
private void action() {
number = true;
textfield.setText("0");
equalOp = "=";
op.setTotal("0");
}
class OperatorListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
if (number) {
action();
textfield.setText("0");
} else {
number = true;
String displayText = textfield.getText();
if (equalOp.equals("=")) {
op.setTotal(displayText);
} else if (equalOp.equals("+")) {
op.add(displayText);
} else if (equalOp.equals("-")) {
op.subtract(displayText);
} else if (equalOp.equals("*")) {
op.multiply(displayText);
} else if (equalOp.equals("/")) {
op.divide(displayText);
}
textfield.setText("" + op.getTotalString());
equalOp = e.getActionCommand();
}
}
}
class NumberListener implements ActionListener {
public void actionPerformed(ActionEvent event) {
String digit = event.getActionCommand();
if (number) {
textfield.setText(digit);
number = false;
} else {
textfield.setText(textfield.getText() + digit);
}
}
}
public class CalculatorOp {

private int total;
public CalculatorOp() {
total = 0;
}
public String getTotalString() {
return ""+total;
}
public void setTotal(String n) {
total = convertToNumber(n);
}
public void add(String n) {
total += convertToNumber(n);
}
public void subtract(String n) {
total -= convertToNumber(n);
}
public void multiply(String n) {
total *= convertToNumber(n);
}
public void divide(String n) {
total /= convertToNumber(n);
}
private int convertToNumber(String n) {
return Integer.parseInt(n);
}
}
}

Its output result is as follows:

Create Database with Netbeans Program and Ms.Access

2009-02-11T23:32:00.003+07:00

Hi all readers, this project we will create a database program using Netbeans IDE 6.5 Database and Ms.Access. Software may Netbeans is new for us. Yes the actual program Netbeans is a software used to create a program based on JAVA. We still use the first appearance of white Notepad to create JAVA applications. Akan NotePad but parallel development is replaced by slow start because TEXTPAD facilities provided by this TEXTPAD seems more complete and informative than the notepad. But when we look kebelakang shortages have appeared TEXTPAD again, that is we still have to type the script to make the program components. And that lack is covered by the Netbeans this. Namely to provide component parts without having to type the script to make the withdrawal other GUI Programming Languages. You can create our new project, we:

Here the view that the program will be created:

The Steps:

***> Create database tables and cooperation with the Member as follows:

==================================================================

Noang - Text - 5

Nama - Text - 25

Alamat - Text - 30

Jkel - Yes/no

Agama - Text - 1

NoKTP - Text - 15

NoTelp - Text - 12

Simpanan - Number - LongInt

============================================================

1. Create a design form as shown in the picture. In the form there is a component JTextField, JComboBox, JRadioButton, JPanel, JButton.
2. Change the name of the components that we have entered, especially for components JTextField, JComboBox, JButton, JRadioButton engan way and conditions as follows:

on the project, this time using the provisions of author names the following components to facilitate understanding in making the program code.

Component Component Name Changes

JTextField No Anggota — no

JTextField Nama — nama

JTextField Alamat — alamat

JComboBox Agama — agama

JRadioButton Jkel — RPria dan RWanita

JTextField No KTP — noktp

JTextField No. Telp — notelp

JTextField Simpanan — simpanan

JButton Simpan — bsimpan

JButton Data Baru — bbaru

JButton Keluar — bkeluar

3. After you change the name of each component so it's time to process incoming Coding.

Program Code:
- Below the tab name of your project, click the source:
Under the package type you import the following command to retrieve the sql commands.

=======================================================

import java.sql;

=======================================================

- The declaration of a variable connection, resultset, statement and the other variables that are required

Public under the following class type variables;

=======================================================
//deklarasi variabel global
Connection Con;
ResultSet RsAng;
Statement StatAng;

//variabel for agama
String sagm = “1″;
//variabel for jenis kelamin
Boolean bjkel = true;
//variabel global where data ditemukan
Boolean ada = false;

- Then, under public nama_project (under the introduction of a variable) type the command database connection and table below:

//connection
try
{
String fdata = “z:\\java1\\NetBeans\\Koperasi.mdb”;
Class.forName(”sun.jdbc.odbc.JdbcOdbcDriver”);

// direct connection to the database without dsn
Con= DriverManager.getConnection(”jdbc:odbc:DRIVER={Microsoft Access Driver (*.mdb)};DBQ=” + fdata);
//shows the search process can be in the resultset update
StatAng= Con.createStatement( RsAng.TYPE_SCROLL_SENSITIVE, RsAng.CONCUR_UPDATABLE );
RsAng = StatAng.executeQuery(”Select* from Anggota”);
}
catch(Exception e)
{ System.err.println(”Conection error !” + e.getMessage()); } //getMessage to display the message

=======================================================

- After the connection is successful then the time we go to the key store. Type the following code:

================================================== ====

private void bsimpanActionPerformed(java.awt.event.ActionEvent evt) {

// TODO add your handling code here:

try

{

RsAng.updateString(”Noang”, no.getText());

RsAng.updateString(”Nama”, nama.getText());

RsAng.updateString(”Alamat”, alamat.getText());

RsAng.updateString(”Agama”, sagm);

RsAng.updateBoolean(”Jkel”, bjkel);

RsAng.updateString(”NoKTP”, noktp.getText());

RsAng.updateString(”NoTelp”, notelp.getText());

RsAng.updateDouble(”Simpanan”, Double.parseDouble(simpanan.getText()));

if(ada)

{

//mengedit data yang sudah ada

RsAng.updateRow();

javax.swing.JOptionPane.showMessageDialog(null, “Data Telah Diedit !”);

}

else

//menyisipkan record baru

RsAng.insertRow();

javax.swing.JOptionPane.showMessageDialog(null, “Data Telah Tersimpan !”);

}

catch(Exception e)

{

javax.swing.JOptionPane.showMessageDialog(null, “Data Belum Tersimpan !” + e.getMessage());

}

======================================================

- Code Programs for RadioButton Male:

======================================================

private void RPriaActionPerformed(java.awt.event.ActionEvent evt) {

// TODO add your handling code here:

bjkel = true;

}

======================================================

- Code Programs for Women's RadioButton:

======================================================

private void RWanitaActionPerformed(java.awt.event.ActionEvent evt) {

// TODO add your handling code here:

bjkel = false;

}

=====================================================

- To type a ComboBox in the code the program:

=====================================================

private void agamaActionPerformed(java.awt.event.ActionEvent evt) {

// TODO add your handling code here:

// Baca Source objectnya masih JcomboBox

javax.swing.JComboBox soagama = (javax.swing.JComboBox)evt.getSource();

//Membaca Item Yang Terpilih — > String

String sagama = (String)soagama.getSelectedItem();

//pengujian sagama

if (sagama.equals(”Islam”))

sagm = “1″;

else if (sagama.equals(”Kristen”))

sagm = “2″;

else if (sagama.equals(”Hindhu”))

sagm = “3″;

else if (sagama.equals(”Budha”))

sagm = “4″;

else if (sagama.equals(”Konghu Chu”))

sagm = “5″;

}

=====================================================

- Keys To New Data type program:

=====================================================

private void bbaruActionPerformed(java.awt.event.ActionEvent evt) {

// TODO add your handling code here:

no.setText(”");

nama.setText(”");

alamat.setText(”");

noktp.setText(”");

notelp.setText(”");

simpanan.setText(”");

}

=====================================================

- To Exit Button component type in the code the program:

=====================================================

private void bkeluarActionPerformed(java.awt.event.ActionEvent evt) {

// TODO add your handling code here:

//Tutup Koneksi

try

{

Con.close();

RsAng.close();

StatAng.close();

Con = null; RsAng = null; StatAng = null;

}

catch (Exception e){}

System.exit(0);

}

====================================================

Additional notes (rusted Bos)

- To fill the ComboBox religion you click on the ComboBox component on the properties and religious search model, then click the dialog box will appear as follows:

- Add the components in the form buttongroup note discount image below:

Drag to your form. But you will not see But wujudnya.hehehehehe to change the name of the components please enter your navigator to the left side of your monitor. Change the name of its components with the name "bgjkel"

- After entering ButtonGroup components and change the name then click on the component RPria and RWanita properties and then on the search button and change the group into bgjkel.

Congratulations you try a new project in NetBeans IDE 6.5

Author apologize because order is still not known to this article. Because I do not have spare time to improve the view. Thank you already want to visit.

NetBeans IDE Java Quick Start Tutorial (Hello Word)

2009-02-11T11:10:00.005+07:00

Welcome to NetBeans IDE!

This tutorial provides a very simple and quick introduction to the NetBeans IDE workflow by walking you through the creation of a simple "Hello World" Java console application. Once you are done with this tutorial, you will have a general knowledge of how to create and run applications in the IDE.

This tutorial takes less than 10 minutes to complete.

After you finish this tutorial, you can move on to the learning trails, which are linked from the Documentation, Training & Support page. The learning trails provide comprehensive tutorials that highlight a wider range of IDE features and programming techniques for a variety of application types. If you do not want to do a "Hello World" application, you can skip this tutorial and jump straight to the learning trails.

To complete this tutorial, you need the following software and resources.

Software or Resource	Version Required
NetBeans IDE	version 6.5
Java Development Kit (JDK)	version 6 or version 5

Setting Up the Project

To create an IDE project:

Start NetBeans IDE.
In the IDE, choose File > New Project (Ctrl-Shift-N), as shown in the figure below.
New Project menu item selected." class="margin-around" height="85" width="199">
In the New Project wizard, expand the Java category and select Java Application as shown in the figure below. Then click Next.
In the Name and Location page of the wizard, do the following (as shown in the figure below):
- In the Project Name field, type HelloWorldApp.
- Leave the Use Dedicated Folder for Storing Libraries checkbox unselected.
- In the Create Main Class field, type helloworldapp.HelloWorldApp.
- Leave the Set as Main Project checkbox selected.
Click Finish.

The project is created and opened in the IDE. You should see the following components:

The Projects window, which contains a tree view of the components of the project, including source files, libraries that your code depends on, and so on.
The Source Editor window with a file called HelloWorldApp open.
The Navigator window, which you can use to quickly navigate between elements within the selected class.
The Tasks window, which lists compilation errors as well other tasks that are marked with keywords such as XXX and TODO.

Adding Code to the Generated Source File

Because you have left the Create Main Class checkbox selected in the New Project wizard, the IDE has created a skeleton class for you. You can add the "Hello World!" message to the skeleton code by replacing the line:

            // TODO code application logic here

with the line:

            System.out.println("Hello World!");

Save the change by choosing File > Save.

The file should look something like the following code sample.

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

package helloworldapp;

/**
*
* @author Patrick Keegan
*/
public class HelloWorldApp {

/**
* @param args the command line arguments
*/
public static void main(String[] args) {
       System.out.println("Hello World!");
}

}

Compiling and Running the Program

Because of the IDE's Compile on Save feature, you do not have to manually compile your project in order to run it in the IDE. When you save a Java source file, the IDE automatically compiles it.

To run the program:

Choose Run > Run Main Project (F6).

The next figure shows what you should now see.

Congratulations! Your program works!

If there are compilation errors, they are marked with red glyphs in the left and right margins of the Source Editor. The glyphs in the left margin indicate errors for the corresponding lines. The glyphs in the right margin show all of the areas of the file that have errors, including errors in lines that are not visible. You can mouse over an error mark to get a description of the error. You can click a glyph in the right margin to jump to the line with the error.

Building and Deploying the Application

Once you have written and test run your application, you can use the Clean and Build command to build your application for deployment. When you use the Clean and Build command, the IDE runs a build script that performs the following tasks:

Deletes any previously compiled files and other build outputs.
Recompiles the application and builds a JAR file containing the compiled files.

To build your application:

Choose Run > Clean and Build Main Project (Shift-F11).

You can view the build outputs by opening the Files window and expanding the HelloWorldApp node. The compiled bytecode file HelloWorldApp.class is within the build/classes/helloworldapp subnode. A deployable JAR file that contains the HelloWorldApp.class is within the dist node.

NetBeans IDE Installation Guide

2009-02-11T10:58:00.002+07:00

Windows

On Microsoft Windows platforms, you can pick from one of the following downloads:

Self-extracting installer
Archive distribution

Using the Windows Installer

Once you have downloaded the installer file, double-click the file to start the installation wizard. The installer enables you to specify:

the Java™ 2 Software Development Kit to run the IDE on.
which directory to install NetBeans IDE into.
whether to associate .java and .nbm (NetBeans module files) with the IDE.

To launch NetBeans IDE, do one of the following:

Double-click the NetBeans IDE icon on your desktop.
Select NetBeans IDE | NetBeans IDE 3.6 | NetBeans IDE from the Start menu.

Using Archive Installations on Windows Machines

While the installer described above is the preferred method of installation on Microsoft Windows machines, you can also install NetBeans IDE using a tar.gz or zip file. Common archive utilities like Winzip can work with both of these file types.

To install NetBeans IDE:

Locate the archive that you have downloaded and double-click it to open your archive file tool.
Using your archive tool, extract all files to an empty directory, such as C:\NetBeans IDE 3.6.

To launch NetBeans IDE:

Navigate to the bin subdirectory of your NetBeans IDE installation.
Double-click runide.exe to start NetBeans IDE.

Solaris™ Operating System (Solaris OS) and Linux Platforms

On the Solaris and Linux platforms, you can pick from one of the following downloads:

Binary installer
Archive distribution

Using the Solaris and Linux Installers

To install NetBeans IDE:

From a command prompt, navigate to the directory that contains the installer.
If necessary, change the permissions to make the binary executable by typing $ chmod +x NetBeans.bin (replacing NetBeans.bin with the actual filename of the distribution that you downloaded).
Start the installer by typing $ ./NetBeans.bin (replacing NetBeans.bin with the actual filename of the distribution that you downloaded).

The installer will search for any installed J2SDKs and prompt you for which NetBeans IDE should use. You can specify a J2SDK at the command line, which might speed the installation process. For example:

$ ./NetBeans.bin -is:javahome path_to_your_jdk

Using Archive Installations on UNIX® platforms

To install NetBeans IDE:, use the appropriate tools on your platform to untar or unzip the archive distribution to a clean directory. For example, type the following from a command prompt:

$ gzip -d NetBeans.tar.gz
$ tar xf NetBeans.tar

(replacing NetBeans.tar.gz and NetBeans.tar with the actual file names).

Note: Solaris users should use GNU tar for tar.gz files to ensure that the whole archive is unpacked.

To launch NetBeans IDE, change directories to the bin subdirectory of your installation and execute the runide.sh launcher script.

Macintosh OS X

On the Macintosh OS X platform, you can pick from one of the following downloads:

Disk image format (.dmg) file
Archive distribution

Note: Mac OS users should use the .dmg file, which has a patch to fix the problem that is cited in issue 39780. If you install an archive distribution of the IDE on Mac OS, you could have problems properly shutting down the IDE.

Using the disk image format (.dmg) file

Once you have downloaded the image file, double-click the file to mount the file in your system.

To launch NetBeans IDE, run the NetBeansLauncher application.

Using Archive Installations on the Mac OS platform

To install NetBeans IDE:

Open the Terminal application and change directories to where you would like to install the IDE. On the command line type:

gnutar -xvzf netbeans.tar.gz

(replacing NetBeans.tar.gz with the actual filename of the distribution that you downloaded).

To launch NetBeans IDE, change directories to the bin subdirectory of your installation and execute the runide.sh launcher script.

Other Operating Systems

Using Archive Installations
Unpack your archive using the utilities appropriate for your system.

To launch NetBeans IDE, navigate to the bin subdirectory of your NetBeans IDE installation and execute the launcher that is appropriate for your system. The following launchers are available:

runide.exe - Windows
runidew.exe - Windows (no console window)
runide.sh - UNIX
runideos2.cmd - OS/2
runideopenvms.com - OpenVMS

If there is no launcher for your specific operating system, you might need to try to create one by modifying whatever script is most appropriate. If your machine supports JDK 1.4 or greater, you should be able to run the IDE.

Note: If you create a launcher, you could contribute it to the project.

Installing on beta versions of Java™ 2 Software Development Kit (J2SDK), v. 1.5

You can run the IDE on betas of J2SDK v. 1.5, but the installer will not run if that is the only J2SDK that you have on your system. You must also have J2SDK v. 1.4.1 or compatible installed to run the installer. Once the installer is running, you can specify that the IDE should run on J2SDK v. 1.5 beta.

NetBeans!

2009-02-10T12:07:00.004+07:00

1. What is NetBeans?
NetBeans is an open-source Integrated Development Environment (IDE) you can download and use for free. NetBeans is also an extensible platform which you can use to build OS-independent applications. Finally, NetBeans is a thriving open-source community with hundreds of thousands of experienced developers located all around the world. More information.

2. How Do I Get Started?
Download the NetBeans IDE. It has everything you need develop world-class applications. NetBeans software is a 100% Java-based IDE and platform, so it works on every OS where the JDK is available. NetBeans supports a wide range of Java technologies, but is not limited to Java - other languages are supported as well. The NetBeans tools have so much functionality, you can choose which download is best for you. Learn more about supported technologies and features on the features page. You can add more functionality with plug-in modules (in the IDE, choose Tools > Plugins).

3. Where Can I Get Involved?
There is a thriving worldwide community of NetBeans users out there, ranging from new users to gurus. Join them to discuss tips and tricks, NetBeans features, problem solving and much more. Sign up now!

4. How Do I Learn More?
There is a wealth of knowledge here on netbeans.org to get your teeth into, with new content being posted weekly. Tutorials, articles, guides, demos and screencasts.

Welcome! We hope your visit is pleasant.

About the Java Technology

2009-02-10T12:00:00.003+07:00

Java technology is both a programming language and a platform.

The Java Programming Language

The Java programming language is a high-level language that can be characterized by all of the following buzzwords:

Simple
Architecture neutral
Object oriented
Portable
Distributed
High performance
Multithreaded
Robust
Dynamic
Secure

Each of the preceding buzzwords is explained in The Java Language Environment , a white paper written by James Gosling and Henry McGilton.

In the Java programming language, all source code is first written in plain text files ending with the .java extension. Those source files are then compiled into .class files by the javac compiler. A .class file does not contain code that is native to your processor; it instead contains bytecodes — the machine language of the Java Virtual Machine1 (Java VM). The java launcher tool then runs your application with an instance of the Java Virtual Machine.

Figure showing MyProgram.java, compiler, MyProgram.class, Java VM, and My Program running on a computer.

An overview of the software development process.

Because the Java VM is available on many different operating systems, the same .class files are capable of running on Microsoft Windows, the Solaris TM Operating System (Solaris OS), Linux, or Mac OS. Some virtual machines, such as the Java HotSpot virtual machine, perform additional steps at runtime to give your application a performance boost. This include various tasks such as finding performance bottlenecks and recompiling (to native code) frequently used sections of code.

Figure showing source code, compiler, and Java VM's for Win32, Solaris OS/Linux, and Mac OS

Through the Java VM, the same application is capable of running on multiple platforms.

The Java Platform

A platform is the hardware or software environment in which a program runs. We've already mentioned some of the most popular platforms like Microsoft Windows, Linux, Solaris OS, and Mac OS. Most platforms can be described as a combination of the operating system and underlying hardware. The Java platform differs from most other platforms in that it's a software-only platform that runs on top of other hardware-based platforms.

The Java platform has two components:

The Java Virtual Machine
The Java Application Programming Interface (API)

You've already been introduced to the Java Virtual Machine; it's the base for the Java platform and is ported onto various hardware-based platforms.

The API is a large collection of ready-made software components that provide many useful capabilities. It is grouped into libraries of related classes and interfaces; these libraries are known as packages. The next section, What Can Java Technology Do? highlights some of the functionality provided by the API.

Figure showing MyProgram.java, API, Java Virtual Machine, and Hardware-Based Platform

The API and Java Virtual Machine insulate the program from the underlying hardware.
As a platform-independent environment, the Java platform can be a bit slower than native code. However, advances in compiler and virtual machine technologies are bringing performance close to that of native code without threatening portability.

The terms"Java Virtual Machine" and "JVM" mean a Virtual Machine for the Java platform.