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.

The Result

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.

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




1. public static int main(char args[])


2. public static void main(String args[])


3. public static void MAIN(String args[])


4. public static void main(String args)


5. public static void main(char args[])




2. 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);          
}       
}    
} 
}    





1. i=0 j=0


2. i=0 j=1


3. i=0 j=2


4. i=1 j=0


5. i=1 j=1


6. i=1 j=2


7. i=2 j=0


8. i=2 j=1


9. i=2 j=2




3. 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);    
} 
}              





1. test


2. test -1


3. 0


4. 1


5. 2




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


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



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




1. extern


2. synchronized


3. volatile


4. friend


5. friendly


6. transient


7. this


8. then




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




1. true


2. false




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




1. The number of bytes is compiler dependent.


2. 2


3. 4


4. 8


5. 64




9. 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.


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




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


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


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


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





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




1. 25


2. 37


3. 6


4. 31


5. 17


6. 9


7. 24




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




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


2. ~ operator is the bit-wise XOR operator.


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


4. The unsigned right shift operator in Java is >>.




13. 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.


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




1. A class that is abstract may not be instantiated.


2. 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++.


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


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




15. 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;       
}    
} 
}              





1. 0


2. 1


3. 2


4. 3





16. 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);    
} 
}              





1. 0


2. 1


3. 2


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




17. 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);      
    } 
    }              

    
    
    
    
    1. 0
    
    
    2. 1
    
    
    3. 2
    
    
    4. 3
    
    
    5. 4
    
    
    
    


18. 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);      
} 
}              





1. 0


2. 1


3. 2


4. 3


5. 4




19. 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);     
} 
}              





1. 1


2. 2


3. 3


4. 4




20. 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);     
} 
}              





1. 1


2. 2


3. 3


4. 4





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




1. int i[5][];


2. int i[][];


3. int []i[];


4. int i[5][5];


5. int[][] a;




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




1. The range of values is compiler dependent.


2. -231 to 231 - 1


3. -231-1 to 231


4. -215 to 215 - 1


5. -215-1 to 215




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




1. By invoking the free method on the object.


2. By calling system.gc() method.


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


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





24. 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. 0


2. 1


3. 2


4. -1




25. 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.




1. void m() throws IOException{}


2. void m() throw IOException{}


3. void m(void) throws IOException{}


4. m() throws IOException{}


5. void m() {} throws IOException




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




1. %abcd


2. $abcd


3. 1abcd


4. package


5. _a_long_name




27. 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              





1. Before statement labeled 1


2. Before statement labeled 2


3. Before statement labeled 3


4. Before statement labeled 4


5. Never.




28. String s = new String("xyz");
    
    Assuming the above declaration, which of the following statements would compile. Select the one correct answer.




1. s = 2 * s;


2. int i = s[0];


3. s = s + s;


4. s = s >> 2;


5. None of the above.





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




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


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


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


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




30. 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.




1. void method() { }


2. int method() { return 0;}


3. void method(int i) { }


4. private void method() { }




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



int i = 0, j = 1;




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


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


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


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





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




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


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


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


4. The Thread class is an abstract class.




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




1. transient


2. volatile


3. synchronized


4. native


5. static


6. final




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




1. Collection


2. Set


3. List


4. Map





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




1. HashMap


2. Hashtable


3. TreeMap


4. HashSet


5. TreeSet


6. Vector




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




1. Methods declared in interfaces are implicitly private.


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


3. An interface can extend any number of interfaces.


4. The keyword implements indicate that an interface inherits from another.




37. 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.




1. test();


2. super.test();


3. super.super.test();


4. ::test();


5. C.test();


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




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



39. 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);   
}
}    





1. 4


2. 5


3. 6


4. 6.1


5. 9




40. 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.




1. true


2. false




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




1. InputStream


2. PrintStream


3. Reader


4. FileInputStream


5. FileWriter




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



43. 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);    
} 
}    





1. abc


2. def


3. abcabc


4. abcdef


5. defabc


6. abcdefdef




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




1. The member variable called size


2. The member variable called length


3. The method size() returns the number of characters.


4. The method length() returns the number of characters.




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




1. valueOf


2. intValue


3. getInt


4. getInteger




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


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




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


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


3. An abstract class can be declared as final.


4. Local variables cannot be declared as static.





48. 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.




1. static


2. final


3. abstract


4. native


5. volatile


6. transient




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




1. Tree


2. Stack


3. Queue


4. Array


5. LinkedList


6. Map





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




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


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


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


4. 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.





51. The default layout manager for a Frame is ...




1. FlowLayout


2. BorderLayout


3. GridLayout


4. GridBagLayout


5. CardLayout




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




1. ComponentAdapter


2. ActionAdapter


3. AdjustmentAdapter


4. ItemAdapter


5. FocusAdapter




53. 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();


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




1. List


2. Button


3. Choice


4. CheckBox


5. TextField


6. MenuItem




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


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




1. Applet


2. Runnable


3. Thread


4. Object




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




1. FlowLayout


2. GridLayout


3. BorderLayout


4. CardLayout


5. GridBagLayout




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




1. MouseMotionListener


2. WindowListener


3. DialogListener


4. PaintListener




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

1. b


2. b, c, f


3. 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.


4. arr.length


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



6. b, c, f, g


7. a


8. d


9. "am"


10. 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.



11. a


12. a


13. protected


14. a, c


15. b, c



16. c


17. a, d, e


18. d, e


19. a, c


20. b, c



21. b, c, e


22. b


23. d



24. a


25. a


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


27. d


28. c



29. c, d


30. a, c


31. b, d



32. b, c


33. c


34. c



35. c


36. b, c


37. f


38. long



39. e


40. a


41. a, c


42. Set



43. a


44. d


45. b


46. int


47. d



48. a


49. f


50. c, d


51. b


52. a, e


53. Object getSource();


54. a, b, e, f


55. Menu


56. d


57. a


58. a, b


59. MenuComponent

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 “panggilan” 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:

1. public ServerSocket(int port) throws BindException, IOException
2. public ServerSocket(int port, int queueLength) throws BindException, IOException
3. public ServerSocket(int port, int queueLength, InetAddress bindAddress) throws IOException
4. public ServerSocket( ) throws IOException // Java 1.4

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

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.

1. Make one project is Netbeans new


2. Add one JFrame Form


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


4. Following code cannikin type on btnCheckHostName, event actionPerformed
   
   
   1. private void btnCheckHostNameActionPerformed(java.awt.event.ActionEvent evt) {
   
   
   2. try {
   
   
   3. String strHostName = InetAddress.getByName(txtIPAddress.getText()).getHostName();
   
   
   4. JOptionPane.showMessageDialog(null, "Host name dari IP Address '" + txtIPAddress.getText() +"' =
      "+ strHostName);
   
   
   5. } catch (UnknownHostException ex) {
   
   
   6. JOptionPane.showMessageDialog(null, ex);
   
   
   7. Logger.getLogger(frmIpAddress.class.getName()).log(Level.SEVERE, null, ex);
   
   
   
   
   9. }
   
   
   
   
   11. }

   
   


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


6. Following code cannikin type on btnCheckIPAddress, event actionPerformed
   
   
   

   
   
   1. private void btnCheckIPAddressActionPerformed(java.awt.event.ActionEvent evt) {
   
   
   
   
   3. try {
   
   
   4. String strIPAddress = InetAddress.getByName(txtHostName.getText()).getHostAddress() ;
   
   
   5. JOptionPane.showMessageDialog(null, "Alamat IP dari '"+txtHostName.getText() +"' ="+ strIPAddress);
   
   
   6. } catch (UnknownHostException ex) {
   
   
   7. JOptionPane.showMessageDialog(null, ex);
   
   
   8. Logger.getLogger(frmIpAddress.class.getName()).log(Level.SEVERE, null, ex);
   
   
   
   
   10. }
   
   
   11. }

   
   


7. Following code cannikin type on btnCheckLokal event actionPerformed


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


2. try {


3. InetAddress AlamatInternet = InetAddress.getLocalHost();


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


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


6. } catch (UnknownHostException ex) {


7. JOptionPane.showMessageDialog(null, ex);


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




10. }


11. }



8. 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.

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):

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!

, 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.

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.

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.

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!

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

Its output result is as follows:

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:

***> 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.

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:

1. Start NetBeans IDE.
2. 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">

3. In the New Project wizard, expand the Java category and select Java Application as shown in the figure below. Then click Next.
4. 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.

   

5. 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.