Java Swing Telecom objects bean

Hi,
I wish to use Java Swing Teleom graphics Swing object for our Network Management swing based applications. Can somebody suggests some useful thirdparty which can allow us to develop our application. One company I know is ILOG. Are there any other.
Thanks
Ashish

I think TWaver of SERVASOFT is another good choice. You can find more detailed information at www.servasoft.com/snapshots.htm

Similar Messages

Scope and Objectives of making java swing scientific calculator

I am going to write code for java swing scientific calculator..... can any body help me to write scope and objectives of this project.... please please :-(

If this is for school work, then defining the scope is part of the problem. The only advice I will give you is that you only need to implement what the assignment specifies. It is probably intentionally vague so you can bite off way too much and not finish -- failure should teach you something too.
I had just such an assignment in my software engineering class in college -- create a cross compiler from X to Y where X and Y where known instruction sets. That was the entire assignment -- plus the instruction sets for X and Y. My team looked at the allotted time and resources availabe and decided to do a minimal implementation.
We where the only team to complete the assignment and all recieved A's because we accurately implemented the required solution and were able to evaluate the real problem--resource allotment--accurately.
Each other team tried to add "extras" that would "guarantee" them an A grade. In actuallity it was just a lot more work than they could do though and it hurt them in the long run--No matter how good the work was to the point they had at the end of the semester, each student in the other teams only recieved a B or less grade in the class due to failure on that project. Resource allocation and planning--only you can do that for your team/project.

Changeing to mouse floatable in java swing object

Hi All
I want change to my select mouse floatable swing object functionality in java swing Application. If it mouse over functionality window or Frame based application. If anybody feel easy sloution that ,plz help solve this problem.
Thanx to Advance.
Bye
ARjun...

select mouse floatable swing object"huh?
If it mouse over functionality window or Frame based application.double huh?
be a little more clear..i don't think anyone here understand what you're asking for.
here's my take on your question (guess).
Are you asking for dockable Panel and component?
ie)
you have a create JComponent that is added to a JFrame, etc..
When the user move the mouse over the component, and perform a mouse press, you want to allow the user to move the component to another location (the component is dockable??)
There are severals Dockable panel and compoent out there for free..so i suggest that you would use them ; rather than writing your own.

PL/SQL and Java Swing interface

Everybody in this forum knows that Oracle is the best database around
with many functionalities, stability, performance, etc. We also know
that PL/SQL is a great language to manipulate information directly
in the database with many built in functions, OOP capability,
transaction control, among other features. Today an application that
manipulates information, which needs user interface, requires components
to be developed using different technologies and normally running in
different servers or machines. For example, the interface is done using
a dynamic HTML generator like JSP, PHP, PL/SQL Web Toolkit, etc.
This page is executed in an application server like Oracle iAS or
Tomcat, just to name two, which in turn access a database like Oracle to
build the HTML. Also rich clients like Java applets require an intermediate
server to access the database (through servlets for example) although
it is possible to access the database directly but with security issues.
Another problem with this is that complexity increases a lot, many
technologies, skills and places to maintain code which leads to a greater
failure probability. Also, an application is constantly evolving, new
calculations are added, new tables, changed columns. If you have an
application with product code for example and you need to increase its
size, you need to change it in the database, search for all occurrences
of it in the middle-tier code and perhaps adjust interfaces. Normally
there is no direct dependency among the tier components. On another
issue, many application interfaces today are based on HTML which doesn't
have interactive capabilities like rich-client interfaces. Although it
is possible to simulate many GUI widgets with JavaScript and DHTML, it is
far from the interactive level we can accomplish in rich clients like
Java Swing, Flash MX, Win32, etc. HTML is also a "tag-based" language
originally created to publish documents so even small pages require
many bytes to be transmitted, far beyond of what we see on the screen.
Even in fast networks you have a delay time to wait the page to be
loaded. Another issue, the database is in general the central location
for all kinds of data. Most applications relies on it for security,
transaction and availability. My proposal is to use Oracle as the
central location for interface, processing and data. With this approach
we can create not only the data manipulation procedures in the database,
but procedures that also control and manage user interfaces. Having
a Oracle database as the central location for all components has many
advantages:
- Unique point of maintenance, backup and restore
- Integrated database security
- One language for everything, PL/SQL or Java (even both if desired)
- Inherited database cache, transaction and processing optimizations
- Direct access to the database dictionary
- Application runs on Oracle which has support for many platforms.
- Transparent use of parallel processing, clusters and future
background technologies
Regarding the interface, I already created a Java applet renderer
which receives instructions from the database on how to create GUI
objects and how to respond to events. The applet is only 8kb and can
render any Swing or AWT object/event. The communication is done
through HTTP or HTTPS using Oracles's MOD_PLSQL included in the Apache
HTTP server which comes with the database or application server (iAS).
I am also creating a database framework and APIs in PL/SQL to
create and manipulate the client interface. The applet startup is
very fast because it is very small, you don't need to download large
classes with the client interface. Execution is done "on-demand"
according to instructions received from the database. The instructions
are very optimized in terms of network bandwidth and based on preliminary
tests it can be up to 1/10 of a similar HTML screen. Less network usage
means faster response and means that even low speed connections will
have a good performance (a future development can be to use this in
wireless devices like PDAs e even cell phones, just an idea for now).
The applet can also be executed standalone by using Java Web Start.
With this approach no business code, except the interface, is executed
on the client. This means that alterations in the application are
dynamically reflected in the client, no need to "re-download" the
application. Events are transmitted when required only so network
usage is minimized. It is also possible to establish triggering
events to further reduce network usage. Since the protocol used is
HTTP (which is stateless), the database framework I am creating will
be responsible to maintain the state of connections, variables, locks
and session information, so the developer don't need to worry about it.
The framework will have many layers, from communication up to
application so there will be pre-built functions to handle queries,
pagination, lock, mail, log, etc. The final objective is to have a
rich client application integrated into the database with minimum
programming and maintenance requirements, not forgetting customization
capabilities. Below is a very small example of what can de done. A
desktop with two windows, each window with two fields, a button with an
image to switch the values, and events to convert the typed text when
leaving the field or double-clicking it. The "leave" event also has an
optimization to only be triggered when the text changes. I am still
developing the framework and adjusting the renderer but I think that all
technical barriers were transposed by now. The framework is still in
the early stages, my guess is that only 5% is done so far. As a future
development even an IDE can be created so we have a graphical environment
do develop applications. I am willing to share this with the PL/SQL
community and listen to ideas and comments.
Example:
create or replace procedure demo1 (
jre_version in varchar2 := '1.4.2_01',
debug_info in varchar2 := 'false',
compress_buffer in varchar2 := 'false',
optimize_buffer in varchar2 := 'true'
) as
begin
interface.initialize('demo1_init','JGR Demo 1',jre_version,debug_info,compress_buffer,optimize_buffer);
end;
create or replace procedure demo1_init as
begin
toolkit.initialize;
toolkit.create_icon('icon',interface.global_root_url||'img/switch.gif');
toolkit.create_internal_frame('frame1','Frame 1',50,50,300,136);
toolkit.create_label('frame1label1','frame1',10,10,50,20,'Field 1');
toolkit.create_label('frame1label2','frame1',10,40,50,20,'Field 2');
toolkit.create_text_field('frame1field1','frame1',50,10,230,20,'Field 1','Field 1',focus_event=>true,mouse_event=>true);
toolkit.create_text_field('frame1field2','frame1',50,40,230,20,'Field 2','Field 2',focus_event=>true,mouse_event=>true);
toolkit.set_text_field_event('frame1field1',toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,'FIELD 1','false');
toolkit.set_text_field_event('frame1field2',toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,'FIELD 2','false');
toolkit.set_text_field_event('frame1field1',toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,'field 1','false');
toolkit.set_text_field_event('frame1field2',toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,'field 2','false');
toolkit.create_button('button1','frame1',10,70,100,25,'Switch','Switch the values of "Field 1" and "Field 2"','S','icon');
toolkit.set_button_event('button1',toolkit.action_performed_event,'demo1_switch_fields(''frame1field1'',''frame1field2'')','frame1field1:'||toolkit.get_text_method||',frame1field2:'||toolkit.get_text_method);
toolkit.create_internal_frame('frame2','Frame 2',100,100,300,136);
toolkit.create_label('frame2label1','frame2',10,10,50,20,'Field 1');
toolkit.create_label('frame2label2','frame2',10,40,50,20,'Field 2');
toolkit.create_text_field('frame2field1','frame2',50,10,230,20,'Field 1','Field 1',focus_event=>true,mouse_event=>true);
toolkit.create_text_field('frame2field2','frame2',50,40,230,20,'Field 2','Field 2',focus_event=>true,mouse_event=>true);
toolkit.set_text_field_event('frame2field1',toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,'FIELD 1','false');
toolkit.set_text_field_event('frame2field2',toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,'FIELD 2','false');
toolkit.set_text_field_event('frame2field1',toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,'field 1','false');
toolkit.set_text_field_event('frame2field2',toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,'field 2','false');
toolkit.create_button('button2','frame2',10,70,100,25,'Switch','Switch the values of "Field 1" and "Field 2"','S','icon');
toolkit.set_button_event('button2',toolkit.action_performed_event,'demo1_switch_fields(''frame2field1'',''frame2field2'')','frame2field1:'||toolkit.get_text_method||',frame2field2:'||toolkit.get_text_method);
end;
create or replace procedure demo1_set_upper as
begin
toolkit.set_string_method(interface.global_object_name,toolkit.set_text_method,upper(interface.array_event_value(1)));
toolkit.set_text_field_event(interface.global_object_name,toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,upper(interface.array_event_value(1)),'false');
end;
create or replace procedure demo1_set_lower as
begin
toolkit.set_string_method(interface.global_object_name,toolkit.set_text_method,lower(interface.array_event_value(1)));
toolkit.set_text_field_event(interface.global_object_name,toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,lower(interface.array_event_value(1)),'false');
end;
create or replace procedure demo1_switch_fields (
field1 in varchar2,
field2 in varchar2
) as
begin
toolkit.set_string_method(field1,toolkit.set_text_method,interface.array_event_value(2));
toolkit.set_string_method(field2,toolkit.set_text_method,interface.array_event_value(1));
toolkit.set_text_field_event(field1,toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,upper(interface.array_event_value(2)),'false');
toolkit.set_text_field_event(field2,toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,upper(interface.array_event_value(1)),'false');
toolkit.set_text_field_event(field1,toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,lower(interface.array_event_value(2)),'false');
toolkit.set_text_field_event(field2,toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,lower(interface.array_event_value(1)),'false');
end;

Is it sound like Oracle Portal?
But you want to save a layer 9iAS.
Basically, that was the WebDB.(Oracle changed the name to Portal when version 3.0)
Over all, I agree with you.
>>Having a Oracle database as the central location for all components has many
>>advantages:
>>
>>- Unique point of maintenance, backup and restore
>>- Integrated database security
>>- One language for everything, PL/SQL or Java (even both if desired)
>>- Inherited database cache, transaction and processing optimizations
>>- Direct access to the database dictionary
>>- Application runs on Oracle which has support for many platforms.
>>- Transparent use of parallel processing, clusters and future
>>background technologies
I would like to build 'ZOPE' inside Oracle DB as a back-end
Using Flash MX as front-end.
Thomas Ku.

FirstGUI.java:7: Package java.swing not found in import.

Hi,
I am currently taking JAVA at UGA and am trying to learn the GUI part on my own, since our professor is not going to cover this. This is the first error I get when I compile the program. Any help is greatly appreciated...
Thanks,
Joe
Below is the program...
/* A first GUI. This class creates a label and a button. The count in the label is incremented each
time that the button is pressed.
import java.awt.*;
import java.awt.event.*;
import java.swing.*;
public class FirstGUI extends JPanel {
     // Instance variables
     private int count = 0;          // Number of pushes
     private JButton pushButton;     // Push button
     private JLabel label;          // Label
     // Initialization method
     public void init() {
          // Set the layout manager
          setLayout( new BorderLayout() );
          // Create a label to hold the push count
          label = new JLabel("Push Count: 0");
          add( label, BorderLayout.NORTH );
          label.setHorizontalAlignment( label.CENTER );
          // Create a button
          pushButton = new JButton("Test Button");
          pushButton.addActionListener( new ButtonHandler (this) );
          add( pushButton, BorderLayout.SOUTH );
          // Method to update push count
          public void updateLabel() {
               label.setText( "Push Count: " + (++count) );
     // Main method to create frame
     public static void main(String a[]) {
          // Create a frame to hold the application
          JFrame fr = new JFrame("FirstGUI ...");
          fr.setSize(200,100);
          // Create a Window Listener to handle "close" events
          WindowHandler 1 = new WindowHandler();
          fr.addWindowListener(1);
          // Create and initialize a FirstGUI object
          FirstGUI fg = new FirstGUI();
          fg.init();
          // Add the object to the center of the frame
          fr.getContentPane().add(fg, BorderLayout.CENTER);
          // Display the frame
          fr,setVisible( true );
class ButtonHandler implements ActionListener {
     private FirstGUI fg;
     // Constructor
     public ButtonHandler ( FirstGUI fg1 ) {
          fg = fg1;
     // Execute when an event occurs
     public void actionPerformed( ActionEvent e ) {
          fg.updateLabel();
}

The error is below...
A:\ENGR1140>javac FirstGUI.java
FirstGUI.java:39: Identifier expected.
public static void main(String s[]) {
^
FirstGUI.java:39: 'class' or 'interface' keyword expected.
public static void main(String s[]) {
^
I don't think the actual error is on line 39, I looked in the book that has the code and line 39 is typed just as it is shown in the book.
Below is the program...
/* A first GUI. This class creates a label and a button. The count in the label is incremented each
time that the button is pressed.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class FirstGUI extends JPanel {
     // Instance variables
     private int count = 0;          // Number of pushes
     private JButton pushButton;     // Push button
     private JLabel label;          // Label
     // Initialization method
     public void init() {
          // Set the layout manager
          setLayout( new BorderLayout() );
          // Create a label to hold the push count
          label = new JLabel("Push Count: 0");
          add( label, BorderLayout.NORTH );
          label.setHorizontalAlignment( label.CENTER );
          // Create a button
          pushButton = new JButton("Test Button");
          pushButton.addActionListener( new ButtonHandler (this) );
          add( pushButton, BorderLayout.SOUTH );
          // Method to update push count
          public void updateLabel() {
               label.setText( "Push Count: " + (++count) );
     // Main method to create frame
     public static void main(String s[]) {
          // Create a frame to hold the application
          JFrame fr = new JFrame("FirstGUI ...");
          fr.setSize(200,100);
          // Create a Window Listener to handle "close" events
          WindowHandler 1 = new WindowHandler();
          fr.addWindowListener(1);
          // Create and initialize a FirstGUI object
          FirstGUI fg = new FirstGUI();
          fg.init();
          // Add the object to the center of the frame
          fr.getContentPane().add(fg, BorderLayout.CENTER);
          // Display the frame
          fr,setVisible( true );
class ButtonHandler implements ActionListener {
     private FirstGUI fg;
     // Constructor
     public ButtonHandler ( FirstGUI fg1 ) {
          fg = fg1;
     // Execute when an event occurs
     public void actionPerformed( ActionEvent e ) {
          fg.updateLabel();

Trying to add a java.awt.Choice object to a JTable

Hi
I am creating an app. which uses a JTable as the front end, displaying string data in all cells except the first column, which I need to make java.awt.Choice objects (or equivalent) - users will click the cell, a list of job numbers will be displayed and they click the one they want.
Every time I run the app instead of a drop down list of job numbers I get the text:
java.awt.Choice[choice0,0,0,0x0,invalid,current=K5000]
I am unsure how to proceed.
Any and all help appreciated - for reference my code at present is:
Choice jobNumber = new Choice();
jobNumber.addItem("K5000");
Object[][] dataValues = {
{jobNumbers[0], "A job title", new Integer(0), new Integer(0), new Integer(8), new Integer(8), new Integer(4), new Integer(0), new Integer(0)},
where the JTable constructor is passed this array
regards
David

Don't mix Swing and AWT!! Have a look at the JTable tutorial on this site.
http://java.sun.com/docs/books/tutorial/uiswing/components/table.html#combobox

Java Swings Vs Flex which is better?

Hi,
I do not know whether this is the right place to post this thread. We are planning to replace Java Swings client with Adobe Flex GUI. So I am in the process of analyzing the performances and advantages of Flex over Java Swings.
So, Can any one kindly let me know whether Flex supports all the features of Java Swings (like components... etc).
Actually my backend server is also Java and the communication between client and server is based on CORBA.
So, considering all these constraints please comment on this.
Regards,
Purush.

Both support object-oriented GUI development. The same core ideas apply to both, so the jump for a developer isn't too intense. Perhaps the largest difference is that Flex has XML layout files which is a nice plus (although many abuse the capability of injecting logic into it as well). JavaFX is the Java-world answer to Flex, so you may want to play around with that first since it will be more familiar.

How to use a DropDownList in Java Swing.Its very very Urgent

Hi Sir,
Here i need to know how to do (or) create a dropdownlist by using Java Swing.I know that there is JMenuBar & JMenuItems without using that when i click a JButton for example the dropdownlist should come from the top to bottom.I have already posted this quesion once.And i found that it has been removed.So i hope that this time i will get a better answer.Pls.do provide the code as well sir.So that i will be very thankful to u.Since i am involved in a project which contains this
feature.It is very very Urgent.So pls.do provide the code i will be waiting for the reply.
Thanx,
m.ananthu

use JComboBox
JComboBox liste = new JComboBox(new Object[]{"azerty","qwerty});the api documentation :
http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/JComboBox.html
the turotial on combobox :
http://java.sun.com/docs/books/tutorial/uiswing/components/combobox.html

Chess: java swing help need

Hi, I have just learn java swing and now creating a chess game. I have sucessfully create a board and able to display chess pieces on the board. By using JLayeredPane, I am able to use drag and drop for the piece. However, there is a problem which is that I can drop the chess piece off the board and the piece would disappear. I have try to solve this problem by trying to find the location that the chess piece is on, store it somewhere and check if the chess piece have been drop off bound. However, I could not manage to solve it. Also, I am very confuse with all these layer thing.
Any suggestion would be very helpful. Thanks in advance
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
public class ChessBoard extends JFrame implements MouseListener, MouseMotionListener
Object currentPosition;
Color currentColor;
Dimension boardSize = new Dimension(600, 600);
JLayeredPane layeredPane;
JPanel board;
JPanel box;
JLabel chessPiece;
int xAdjustment;
int yAdjustment;
public ChessBoard()
// Use a Layered Pane for this this application
layeredPane = new JLayeredPane();
getContentPane().add(layeredPane);
layeredPane.setPreferredSize( boardSize );
     layeredPane.addMouseListener( this );
layeredPane.addMouseMotionListener( this );
// Add a chess board to the Layered Pane
board = new JPanel();
     // set "board" to the lowest layer (default_layer)
layeredPane.add(board, JLayeredPane.DEFAULT_LAYER);
board.setLayout( new GridLayout(8, 8) );
board.setPreferredSize( boardSize );
board.setBounds(0, 0, boardSize.width, boardSize.height);
     addShade();
     addPiece();
public void addShade()
     for (int i = 0; i < 64; i++)
box = new JPanel( new BorderLayout() );
board.add( box, BorderLayout.CENTER );
     if( ((i / 8) % 2) == 0)
               if( (i % 2) ==0)
                    box.setBackground(Color.lightGray);
               } else {
                    box.setBackground( Color.white);
          } else {
               if( (i % 2) ==0)
                    box.setBackground(Color.white);
               } else {
                    box.setBackground(Color.lightGray);
//Method for adding chess pieces to the board
public void addPiece()
// Add a few pieces to the board
     //black pieces
     for (int i = 0; i < 64; i++)
          //adding black pieces
          if (i < 8)
               String fileName = i + ".gif";
               JLabel blackPieces = new JLabel( new ImageIcon( fileName ) );
               JPanel panel = (JPanel)board.getComponent( i );
               panel.add( blackPieces );
          //adding black pones
          if ((i > 7) && (i < 16))
               String fileName = "8.gif";
               JLabel blackPones = new JLabel( new ImageIcon( fileName ) );
               JPanel panel = (JPanel)board.getComponent( i );
               panel.add( blackPones );
          //jump to white position (Component 48)
          if (i == 16) i = 48;
          //adding white pones
          if(( i > 47 ) && (i < 56))
               JLabel whitePones = new JLabel( new ImageIcon("48.gif") );
               JPanel panel = (JPanel)board.getComponent( i );
               panel.add( whitePones );
          //adding white pieces
          if (i > 55)
               String fileName = i + ".gif";
               JLabel whitePieces = new JLabel( new ImageIcon( fileName ) );
               JPanel panel = (JPanel)board.getComponent( i);
               panel.add( whitePieces );
** Add the selected chess piece to the dragging layer so it can be moved
public void mousePressed(MouseEvent e)
chessPiece = null;
Component c = board.findComponentAt(e.getX(), e.getY());
     c.setBackground(Color.red);
if (c instanceof JPanel) return;
Point parentLocation = c.getParent().getLocation();
xAdjustment = parentLocation.x - e.getX();
yAdjustment = parentLocation.y - e.getY();
chessPiece = (JLabel)c;
chessPiece.setLocation(e.getX() + xAdjustment, e.getY() + yAdjustment);
chessPiece.setSize(chessPiece.getWidth(), chessPiece.getHeight());
layeredPane.add(chessPiece, JLayeredPane.DRAG_LAYER);
** Move the chess piece around
public void mouseDragged(MouseEvent me)
if (chessPiece == null) return;
chessPiece.setLocation(me.getX() + xAdjustment, me.getY() + yAdjustment);
** Drop the chess piece back onto the chess board
public void mouseReleased(MouseEvent e)
     Component c = board.findComponentAt(e.getX(), e.getY());
     int x = (int)c.getBounds().getX();
     int y = (int)c.getBounds().getY();
     System.out.println(c.getLocation());
     System.out.println(x + " "+ y);
     c.setBackground(currentColor);
if (chessPiece == null) return;
chessPiece.setVisible(false);
if (c instanceof JLabel)
Container parent = c.getParent();
     //remove the piece that is capture
parent.remove(0);
parent.add( chessPiece );
else
Container parent = (Container)c;
parent.add( chessPiece );
chessPiece.setVisible(true);
public void mouseClicked(MouseEvent e) {}
public void mouseMoved(MouseEvent e) {}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
private static void createAndShowGUI()
     //Make sure we have nice window decorations
     JFrame.setDefaultLookAndFeelDecorated(true);
     JFrame frame = new ChessBoard();
     frame.setDefaultCloseOperation( JFrame.DISPOSE_ON_CLOSE );
     //Display the window
     frame.pack();
     frame.setResizable( false );
     frame.setLocationRelativeTo( null );
     frame.setVisible(true);
public static void main(String[] args)
     //Schedule a job for the event-dispatching thread:
     //creating and showing this application's GUI
     javax.swing.SwingUtilities.invokeLater( new Runnable()
               public void run()
                    createAndShowGUI();
}

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
public class ChessBoardRx extends JFrame implements MouseListener, MouseMotionListener
    Object currentPosition;
    Color currentColor;
    Dimension boardSize = new Dimension(600, 600);
    JLayeredPane layeredPane;
    JPanel board;
    JPanel box;
    JLabel chessPiece;
    int xAdjustment;
    int yAdjustment;
    Container lastParent;
    public ChessBoardRx()
        // Use a Layered Pane for this this application
        layeredPane = new JLayeredPane();
        getContentPane().add(layeredPane);
        layeredPane.setPreferredSize( boardSize );
        layeredPane.addMouseListener( this );
        layeredPane.addMouseMotionListener( this );
        // Add a chess board to the Layered Pane
        board = new JPanel();
        // set "board" to the lowest layer (default_layer)
        layeredPane.add(board, JLayeredPane.DEFAULT_LAYER);
        board.setLayout( new GridLayout(8, 8) );
        board.setPreferredSize( boardSize );
        board.setBounds(0, 0, boardSize.width, boardSize.height);
        addShade();
        addPiece();
//        populateBoard();
    public void addShade()
        for (int i = 0; i < 64; i++)
            box = new JPanel( new BorderLayout() );
            board.add( box, BorderLayout.CENTER );
            if( ((i / 8) % 2) == 0)
                if( (i % 2) ==0)
                    box.setBackground(Color.lightGray);
                } else {
                    box.setBackground( Color.white);
            } else {
                if( (i % 2) ==0)
                    box.setBackground(Color.white);
                } else {
                    box.setBackground(Color.lightGray);
    //Method for adding chess pieces to the board
    public void addPiece()
        // Add a few pieces to the board
        //black pieces
        for (int i = 0; i < 64; i++)
            //adding black pieces
            if (i < 8)
                String fileName = i + ".gif";
                JLabel blackPieces = new JLabel( new ImageIcon( fileName ) );
                JPanel panel = (JPanel)board.getComponent( i );
                panel.add( blackPieces );
            //adding black pones
            if ((i > 7) && (i < 16))
                String fileName = "8.gif";
                JLabel blackPones = new JLabel( new ImageIcon( fileName ) );
                JPanel panel = (JPanel)board.getComponent( i );
                panel.add( blackPones );
            //jump to white position (Component 48)
            if (i == 16) i = 48;
            //adding white pones
            if(( i > 47 ) && (i < 56))
                JLabel whitePones = new JLabel( new ImageIcon("48.gif") );
                JPanel panel = (JPanel)board.getComponent( i );
                panel.add( whitePones );
            //adding white pieces
            if (i > 55)
                String fileName = i + ".gif";
                JLabel whitePieces = new JLabel( new ImageIcon( fileName ) );
                JPanel panel = (JPanel)board.getComponent( i);
                panel.add( whitePieces );
    private void populateBoard() {
        int[][] pos = {
            { 9, 7, 5, 1, 3, 5, 7, 9 },
            { 8, 6, 4, 0, 2, 4, 6, 8 }
        for(int j = 0; j < 8; j++) {
            String fileName = "chessImages/" + pos[0][j] + ".jpg";
            JLabel label = new JLabel( new ImageIcon( fileName ) );
            JPanel panel = (JPanel)board.getComponent( j );
            panel.add( label );
        for(int j = 8; j < 16; j++) {
            String fileName = "chessImages/" + 11 + ".jpg";
            JLabel label = new JLabel( new ImageIcon( fileName ) );
            JPanel panel = (JPanel)board.getComponent( j );
            panel.add( label );
        for(int j = 56, k = 0; j < 64; j++, k++) {
            String fileName = "chessImages/" + pos[1][k] + ".jpg";
            JLabel label = new JLabel( new ImageIcon( fileName ) );
            JPanel panel = (JPanel)board.getComponent( j );
            panel.add( label );
        for(int j = 48; j < 56; j++) {
            String fileName = "chessImages/" + 10 + ".jpg";
            JLabel label = new JLabel( new ImageIcon( fileName ) );
            JPanel panel = (JPanel)board.getComponent( j );
            panel.add( label );
     ** Add the selected chess piece to the dragging layer so it can be moved
    public void mousePressed(MouseEvent e)
        chessPiece = null;
        Component c = board.findComponentAt(e.getX(), e.getY());
        c.setBackground(Color.red);
        if (c instanceof JPanel) return;
        lastParent = c.getParent();
        Point parentLocation = c.getParent().getLocation();
        xAdjustment = parentLocation.x - e.getX();
        yAdjustment = parentLocation.y - e.getY();
        chessPiece = (JLabel)c;
        chessPiece.setLocation(e.getX() + xAdjustment, e.getY() + yAdjustment);
        chessPiece.setSize(chessPiece.getWidth(), chessPiece.getHeight());
        layeredPane.add(chessPiece, JLayeredPane.DRAG_LAYER);
     ** Move the chess piece around
    public void mouseDragged(MouseEvent me)
        if (chessPiece == null) return;
        chessPiece.setLocation(me.getX() + xAdjustment, me.getY() + yAdjustment);
     ** Drop the chess piece back onto the chess board
    public void mouseReleased(MouseEvent e)
        Component c = board.findComponentAt(e.getX(), e.getY());
        if(c == null) {
            layeredPane.remove(chessPiece);
            lastParent.add(chessPiece);
            Rectangle r = lastParent.getBounds();
            chessPiece.setLocation(r.x+xAdjustment, r.y+yAdjustment);
            lastParent.validate();
            lastParent.repaint();
            return;
        int x = (int)c.getBounds().getX();
        int y = (int)c.getBounds().getY();
        System.out.println(c.getLocation());
        System.out.println(x + " "+ y);
        c.setBackground(currentColor);
        if (chessPiece == null) return;
        chessPiece.setVisible(false);
        if (c instanceof JLabel)
            Container parent = c.getParent();
            //remove the piece that is capture
            parent.remove(0);
            parent.add( chessPiece );
        else
            Container parent = (Container)c;
            parent.add( chessPiece );
        chessPiece.setVisible(true);
    public void mouseClicked(MouseEvent e) {}
    public void mouseMoved(MouseEvent e) {}
    public void mouseEntered(MouseEvent e) {}
    public void mouseExited(MouseEvent e) {}
    private static void createAndShowGUI()
        //Make sure we have nice window decorations
        JFrame.setDefaultLookAndFeelDecorated(true);
        JFrame frame = new ChessBoardRx();
        frame.setDefaultCloseOperation( JFrame.DISPOSE_ON_CLOSE );
        //Display the window
        frame.pack();
        frame.setResizable( false );
        frame.setLocationRelativeTo( null );
        frame.setVisible(true);
    public static void main(String[] args)
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI
        javax.swing.SwingUtilities.invokeLater( new Runnable()
            public void run()
                createAndShowGUI();
}

Facing problem in Java Swing

Hi Sir,
I am using a java GUI Object for taking user name and password (in fields of user name and password) and would like to send the information to a server (in the form of Xml file) on the click of 'Ok' button. The database of registered user is stored on server. If the entered users name or passwords are not correct, the server will send a failure notification to the client (terminal where we typed user name and password). If this is successful, it gives a success notification.
I am doing this using Swings. Also I want all the communication taking place between the server and the client in the form of XML files. being a new to Swings I am facing certain difficulty.
I will appreciate your suggestions and help in this regard.
Thanks and regards,
Sarib

817439 wrote:
Could you please tell me under which category I should post this query. I could not find JAVA Swing section anywhetre in forum home.Steps
1. Determine what it is that you want the database to do and what you want your code to do. This does NOT involve writing code.
2. Learn JDBC
3. Write JDBC classes that does ONLY the database functionality from 1. If it has GUI (swing) code then it is wrong.
4. Unit test it.
5. Learn Swing
6. Write GUI (swing) code that uses the code from 3.
7. Test it.
There is a forum for JDBC - steps 2,3,4.
There is a forum for Swing - steps 5, 6, 7.

Transparent Buttons in Java Swing?

Hi!
I want to create transparent Buttons using java swing for my desktop application. Can any one tell me how to do it?

I can help, but it depends on what you mean by "transparent".
Do you mean TOTALLY transparent, or slightly transparent, or merely translucent? Do you want the text on the button to be in any way transparent? You really need to be more specific.
Basically, though, the concept is pretty simple. All swing components have several methods that can be overridden by somebody who knows what they are doing, in order to customize their appearances.
Some of these are: paint(), paintComponent(), ComponentUI.paint(), etc.
You need to determine the right place to put the new code. Then you extend the class, and change the transparency of the graphics object passed into the method in question, and then pass control to the super implementation of that method.
There are some traps you need to make sure you avoid, though:
1. If you want transparent components, you MUST have the opaque property of the component set to false. Otherwise, the components beneath your transparent button will never update.
2. When you start messing with a graphics object to create transparency, you need to make sure that you revert your changes to the graphics object when you are finished, because all painting uses the same graphics object -> so if you set your button transparent, and then forget to remove the transparency, all objects drawn after the button will also be drawn transparent.
A word of caution:
This sort of manipulation is not hard, but you NEED to understand the painting model for SWING. There are a few articles hosted by sun that can help you in this respect.
Good Luck!
- Adam

Draggable buttons in Java Swing

Hi,
I want to develop an application in Java Swing. The application I am going to develop is an application for developing other applications. I want my application to include a button which also acts as a drag and drop UI element. For example, I want my application to include a button for adding a picture. There are 4 buttons of different pictures. If a user wants to add a picture he can either click on one of these buttons and that picture will be added somewhere on the screen or dragging this button and drop it and that picture will be added where he dropped that button.
Could anyone please tell me
1. If I can develop an application which includes Drag and Drop UI element if I develop it in Java Swing
2. If a button (or other UI element) can act as both a button and a drag and drop element if I develop my application in Java Swing
3.
Could you please tell me where I can find some screenshots of applications which has been developed in Java Swing? I am not familiar with this program and I am not that good at programming, so I would like to get some impression of how it might look like.
Thanks in advanced

1. the good thing about Swing is that it is very flexible and with clever programming you can do just about anything. The problem is that depending on your requirements, this could require a great deal of programming that can be very hard to implement such that it works properly on all popular platforms (windows, linux, mac).
2. see 1.
3. Swing applications are "skinnable", you can give them a great number of different appearances. The default is to give the application a system look and feel, so they look pretty much like any other application for that platform. This means that when you run your application on Windows, it will look like a Windows application, if you run it on a Mac it will look like a Mac application, etc.
I am not familiar with this program and I am not that good at programmingThat is quite a problem, because Swing is not the easiest API around. It requires a solid knowledge of Java and Object Oriented Programming in general as the entire API is based heavily on OOP concepts. To get a better idea of Swing, read through the Swing tutorial here:
http://java.sun.com/docs/books/tutorial/uiswing/

How to Commit table by writting Java code in Managed Bean?

Hi,
Can anyone suggest me how to Commit table by writing Java code in Managed Bean?.
I want to commit table manually after modifying in UI.
Please suggest me guys.
Thanks,
Ramit Mathur

Hi Friend Copy this two java files with same package of your bean package.
1,*ADFUtils.java*
package org.calwin.common.view.utils;(Your package name)
import java.util.ArrayList;
import java.util.List;
import javax.el.ELContext;
import javax.el.ExpressionFactory;
import javax.el.MethodExpression;
import javax.el.ValueExpression;
import javax.faces.context.FacesContext;
import javax.faces.model.SelectItem;
import oracle.adf.model.BindingContext;
import oracle.adf.model.binding.DCBindingContainer;
import oracle.adf.model.binding.DCIteratorBinding;
import oracle.adf.model.binding.DCParameter;
import oracle.adf.share.logging.ADFLogger;
import oracle.binding.AttributeBinding;
import oracle.binding.BindingContainer;
import oracle.binding.ControlBinding;
import oracle.binding.OperationBinding;
import oracle.jbo.ApplicationModule;
import oracle.jbo.Key;
import oracle.jbo.Row;
import oracle.jbo.uicli.binding.JUCtrlValueBinding;
* A series of convenience functions for dealing with ADF Bindings.
* Note: Updated for JDeveloper 11
* @author Duncan Mills
* @author Steve Muench
* $Id: ADFUtils.java 2513 2007-09-20 20:39:13Z ralsmith $.
public class ADFUtils
public static final ADFLogger _LOGGER = ADFLogger.createADFLogger(ADFUtils.class);
* Get application module for an application module data control by name.
* @param pName application module data control name
* @return ApplicationModule
public static ApplicationModule getApplicationModuleForDataControl(String pName)
return (ApplicationModule) JSFUtils.resolveExpression("#{data." + pName + ".dataProvider}");
* A convenience method for getting the value of a bound attribute in the
* current page context programatically.
* @param pAttributeName of the bound value in the pageDef
* @return value of the attribute
public static Object getBoundAttributeValue(String pAttributeName)
return findControlBinding(pAttributeName).getInputValue();
* A convenience method for setting the value of a bound attribute in the
* context of the current page.
* @param pAttributeName of the bound value in the pageDef
* @param pValue to set
public static void setBoundAttributeValue(String pAttributeName, Object pValue)
findControlBinding(pAttributeName).setInputValue(pValue);
* Returns the evaluated value of a pageDef parameter.
* @param pPageDefName reference to the page definition file of the page with the parameter
* @param pParameterName name of the pagedef parameter
* @return evaluated value of the parameter as a String
public static Object getPageDefParameterValue(String pPageDefName, String pParameterName)
BindingContainer bindings = findBindingContainer(pPageDefName);
DCParameter param = ((DCBindingContainer) bindings).findParameter(pParameterName);
return param.getValue();
* Convenience method to find a DCControlBinding as an AttributeBinding
* to get able to then call getInputValue() or setInputValue() on it.
* @param pBindingContainer binding container
* @param pAttributeName name of the attribute binding.
* @return the control value binding with the name passed in.
public static AttributeBinding findControlBinding(BindingContainer pBindingContainer, String pAttributeName)
if (pAttributeName != null)
if (pBindingContainer != null)
ControlBinding ctrlBinding = pBindingContainer.getControlBinding(pAttributeName);
if (ctrlBinding instanceof AttributeBinding)
return (AttributeBinding) ctrlBinding;
return null;
* Convenience method to find a DCControlBinding as a JUCtrlValueBinding
* to get able to then call getInputValue() or setInputValue() on it.
* @param pAttributeName name of the attribute binding.
* @return the control value binding with the name passed in.
public static AttributeBinding findControlBinding(String pAttributeName)
return findControlBinding(getBindingContainer(), pAttributeName);
* Return the current page's binding container.
* @return the current page's binding container
public static BindingContainer getBindingContainer()
return (BindingContainer) JSFUtils.resolveExpression("#{bindings}");
* Return the Binding Container as a DCBindingContainer.
* @return current binding container as a DCBindingContainer
public static DCBindingContainer getDCBindingContainer()
return (DCBindingContainer) getBindingContainer();
* Get List of ADF Faces SelectItem for an iterator binding.
* Uses the value of the 'valueAttrName' attribute as the key for
* the SelectItem key.
* @param pIteratorName ADF iterator binding name
* @param pValueAttrName name of the value attribute to use
* @param pDisplayAttrName name of the attribute from iterator rows to display
* @return ADF Faces SelectItem for an iterator binding
public static List<SelectItem> selectItemsForIterator(String pIteratorName, String pValueAttrName, String pDisplayAttrName)
return selectItemsForIterator(findIterator(pIteratorName), pValueAttrName, pDisplayAttrName);
* Get List of ADF Faces SelectItem for an iterator binding with description.
* Uses the value of the 'valueAttrName' attribute as the key for
* the SelectItem key.
* @param pIteratorName ADF iterator binding name
* @param pValueAttrName name of the value attribute to use
* @param pDisplayAttrName name of the attribute from iterator rows to display
* @param pDescriptionAttrName name of the attribute to use for description
* @return ADF Faces SelectItem for an iterator binding with description
public static List<SelectItem> selectItemsForIterator(String pIteratorName, String pValueAttrName, String pDisplayAttrName, String pDescriptionAttrName)
return selectItemsForIterator(findIterator(pIteratorName), pValueAttrName, pDisplayAttrName, pDescriptionAttrName);
* Get List of attribute values for an iterator.
* @param pIteratorName ADF iterator binding name
* @param pValueAttrName value attribute to use
* @return List of attribute values for an iterator
public static List attributeListForIterator(String pIteratorName, String pValueAttrName)
return attributeListForIterator(findIterator(pIteratorName), pValueAttrName);
* Get List of Key objects for rows in an iterator.
* @param pIteratorName iterabot binding name
* @return List of Key objects for rows
public static List<Key> keyListForIterator(String pIteratorName)
return keyListForIterator(findIterator(pIteratorName));
* Get List of Key objects for rows in an iterator.
* @param pIterator iterator binding
* @return List of Key objects for rows
public static List<Key> keyListForIterator(DCIteratorBinding pIterator)
List<Key> attributeList = new ArrayList<Key>();
for (Row r: pIterator.getAllRowsInRange())
attributeList.add(r.getKey());
return attributeList;
* Get List of Key objects for rows in an iterator using key attribute.
* @param pIteratorName iterator binding name
* @param pKeyAttrName name of key attribute to use
* @return List of Key objects for rows
public static List<Key> keyAttrListForIterator(String pIteratorName, String pKeyAttrName)
return keyAttrListForIterator(findIterator(pIteratorName), pKeyAttrName);
* Get List of Key objects for rows in an iterator using key attribute.
* @param pIterator iterator binding
* @param pKeyAttrName name of key attribute to use
* @return List of Key objects for rows
public static List<Key> keyAttrListForIterator(DCIteratorBinding pIterator, String pKeyAttrName)
List<Key> attributeList = new ArrayList<Key>();
for (Row r: pIterator.getAllRowsInRange())
attributeList.add(new Key(new Object[]
{ r.getAttribute(pKeyAttrName) }));
return attributeList;
* Get a List of attribute values for an iterator.
* @param pIterator iterator binding
* @param pValueAttrName name of value attribute to use
* @return List of attribute values
public static List attributeListForIterator(DCIteratorBinding pIterator, String pValueAttrName)
List attributeList = new ArrayList();
for (Row r: pIterator.getAllRowsInRange())
attributeList.add(r.getAttribute(pValueAttrName));
return attributeList;
* Find an iterator binding in the current binding container by name.
* @param pName iterator binding name
* @return iterator binding
public static DCIteratorBinding findIterator(String pName)
DCIteratorBinding iter = getDCBindingContainer().findIteratorBinding(pName);
if (iter == null)
throw new RuntimeException("Iterator '" + pName + "' not found");
return iter;
* @param pBindingContainer
* @param pIterator
* @return
public static DCIteratorBinding findIterator(String pBindingContainer, String pIterator)
DCBindingContainer bindings = (DCBindingContainer) JSFUtils.resolveExpression("#{" + pBindingContainer + "}");
if (bindings == null)
throw new RuntimeException("Binding container '" + pBindingContainer + "' not found");
DCIteratorBinding iter = bindings.findIteratorBinding(pIterator);
if (iter == null)
throw new RuntimeException("Iterator '" + pIterator + "' not found");
return iter;
* @param pName
* @return
public static JUCtrlValueBinding findCtrlBinding(String pName)
JUCtrlValueBinding rowBinding = (JUCtrlValueBinding) getDCBindingContainer().findCtrlBinding(pName);
if (rowBinding == null)
throw new RuntimeException("CtrlBinding " + pName + "' not found");
return rowBinding;
* Find an operation binding in the current binding container by name.
* @param pName operation binding name
* @return operation binding
public static OperationBinding findOperation(String pName)
OperationBinding op = getDCBindingContainer().getOperationBinding(pName);
if (op == null)
throw new RuntimeException("Operation '" + pName + "' not found");
return op;
* Find an operation binding in the current binding container by name.
* @param pBindingContianer binding container name
* @param pOpName operation binding name
* @return operation binding
public static OperationBinding findOperation(String pBindingContianer, String pOpName)
DCBindingContainer bindings = (DCBindingContainer) JSFUtils.resolveExpression("#{" + pBindingContianer + "}");
if (bindings == null)
throw new RuntimeException("Binding container '" + pBindingContianer + "' not found");
OperationBinding op = bindings.getOperationBinding(pOpName);
if (op == null)
throw new RuntimeException("Operation '" + pOpName + "' not found");
return op;
* Get List of ADF Faces SelectItem for an iterator binding with description.
* Uses the value of the 'valueAttrName' attribute as the key for
* the SelectItem key.
* @param pIterator ADF iterator binding
* @param pValueAttrName name of value attribute to use for key
* @param pDisplayAttrName name of the attribute from iterator rows to display
* @param pDescriptionAttrName name of the attribute for description
* @return ADF Faces SelectItem for an iterator binding with description
public static List<SelectItem> selectItemsForIterator(DCIteratorBinding pIterator, String pValueAttrName, String pDisplayAttrName, String pDescriptionAttrName)
List<SelectItem> selectItems = new ArrayList<SelectItem>();
for (Row r: pIterator.getAllRowsInRange())
selectItems.add(new SelectItem(r.getAttribute(pValueAttrName), (String) r.getAttribute(pDisplayAttrName), (String) r.getAttribute(pDescriptionAttrName)));
return selectItems;
* Get List of ADF Faces SelectItem for an iterator binding.
* Uses the value of the 'valueAttrName' attribute as the key for
* the SelectItem key.
* @param pIterator ADF iterator binding
* @param pValueAttrName name of value attribute to use for key
* @param pDisplayAttrName name of the attribute from iterator rows to display
* @return ADF Faces SelectItem for an iterator binding
public static List<SelectItem> selectItemsForIterator(DCIteratorBinding pIterator, String pValueAttrName, String pDisplayAttrName)
List<SelectItem> selectItems = new ArrayList<SelectItem>();
for (Row r: pIterator.getAllRowsInRange())
selectItems.add(new SelectItem(r.getAttribute(pValueAttrName), (String) r.getAttribute(pDisplayAttrName)));
return selectItems;
* Get List of ADF Faces SelectItem for an iterator binding.
* Uses the rowKey of each row as the SelectItem key.
* @param pIteratorName ADF iterator binding name
* @param pDisplayAttrName name of the attribute from iterator rows to display
* @return ADF Faces SelectItem for an iterator binding
public static List<SelectItem> selectItemsByKeyForIterator(String pIteratorName, String pDisplayAttrName)
return selectItemsByKeyForIterator(findIterator(pIteratorName), pDisplayAttrName);
* Get List of ADF Faces SelectItem for an iterator binding with discription.
* Uses the rowKey of each row as the SelectItem key.
* @param pIteratorName ADF iterator binding name
* @param pDisplayAttrName name of the attribute from iterator rows to display
* @param pDescriptionAttrName name of the attribute for description
* @return ADF Faces SelectItem for an iterator binding with discription
public static List<SelectItem> selectItemsByKeyForIterator(String pIteratorName, String pDisplayAttrName, String pDescriptionAttrName)
return selectItemsByKeyForIterator(findIterator(pIteratorName), pDisplayAttrName, pDescriptionAttrName);
* Get List of ADF Faces SelectItem for an iterator binding with discription.
* Uses the rowKey of each row as the SelectItem key.
* @param pIterator ADF iterator binding
* @param pDisplayAttrName name of the attribute from iterator rows to display
* @param pDescriptionAttrName name of the attribute for description
* @return ADF Faces SelectItem for an iterator binding with discription
public static List<SelectItem> selectItemsByKeyForIterator(DCIteratorBinding pIterator, String pDisplayAttrName, String pDescriptionAttrName)
List<SelectItem> selectItems = new ArrayList<SelectItem>();
for (Row r: pIterator.getAllRowsInRange())
selectItems.add(new SelectItem(r.getKey(), (String) r.getAttribute(pDisplayAttrName), (String) r.getAttribute(pDescriptionAttrName)));
return selectItems;
* Get List of ADF Faces SelectItem for an iterator binding.
* Uses the rowKey of each row as the SelectItem key.
* @param pIterator ADF iterator binding
* @param pDisplayAttrName name of the attribute from iterator rows to display
* @return List of ADF Faces SelectItem for an iterator binding
public static List<SelectItem> selectItemsByKeyForIterator(DCIteratorBinding pIterator, String pDisplayAttrName)
List<SelectItem> selectItems = new ArrayList<SelectItem>();
for (Row r: pIterator.getAllRowsInRange())
selectItems.add(new SelectItem(r.getKey(), (String) r.getAttribute(pDisplayAttrName)));
return selectItems;
* Find the BindingContainer for a page definition by name.
* Typically used to refer eagerly to page definition parameters. It is
* not best practice to reference or set bindings in binding containers
* that are not the one for the current page.
* @param pPageDefName name of the page defintion XML file to use
* @return BindingContainer ref for the named definition
private static BindingContainer findBindingContainer(String pPageDefName)
BindingContext bctx = getDCBindingContainer().getBindingContext();
BindingContainer foundContainer = bctx.findBindingContainer(pPageDefName);
return foundContainer;
* @param pOpList
public static void printOperationBindingExceptions(List pOpList)
if (pOpList != null && !pOpList.isEmpty())
for (Object error: pOpList)
_LOGGER.severe(error.toString());
* Programmatic invocation of a method that an EL evaluates to.
* The method must not take any parameters.
* @param pEl EL of the method to invoke
* @return Object that the method returns
public static Object invokeEL(String pEl)
return invokeEL(pEl, new Class[0], new Object[0]);
* Programmatic invocation of a method that an EL evaluates to.
* @param pEl EL of the method to invoke
* @param pParamTypes Array of Class defining the types of the parameters
* @param pParams Array of Object defining the values of the parametrs
* @return Object that the method returns
public static Object invokeEL(String pEl, Class[] pParamTypes, Object[] pParams)
FacesContext facesContext = FacesContext.getCurrentInstance();
ELContext elContext = facesContext.getELContext();
ExpressionFactory expressionFactory = facesContext.getApplication().getExpressionFactory();
MethodExpression exp = expressionFactory.createMethodExpression(elContext, pEl, Object.class, pParamTypes);
return exp.invoke(elContext, pParams);
* Sets the EL Expression with the value.
* @param pEl EL Expression for which the value to be assigned.
* @param pVal Value to be assigned.
public static void setEL(String pEl, Object pVal)
FacesContext facesContext = FacesContext.getCurrentInstance();
ELContext elContext = facesContext.getELContext();
ExpressionFactory expressionFactory = facesContext.getApplication().getExpressionFactory();
ValueExpression exp = expressionFactory.createValueExpression(elContext, pEl, Object.class);
exp.setValue(elContext, pVal);
* Evaluates the EL Expression and returns its value.
* @param pEl Expression to be evaluated.
* @return Value of the expression as Object.
public static Object evaluateEL(String pEl)
FacesContext facesContext = FacesContext.getCurrentInstance();
ELContext elContext = facesContext.getELContext();
ExpressionFactory expressionFactory = facesContext.getApplication().getExpressionFactory();
ValueExpression exp = expressionFactory.createValueExpression(elContext, pEl, Object.class);
return exp.getValue(elContext);
}

How to create a semi circuler slider using java swing or awt

I am trying to create a Jslider like thing but in semicirculer shape. Thanks in advance for providing any help.

Is it possible to create such UI in java swing?Just to further illustrate, Swing only provides the raw foundation you need to be able to build a GUI. With the stock components you can create static user interfaces with standard controls. If you want to go further, you need to either find a component that somebody else already wrote, or you go into custom painting as previous posters suggested. To do an animating component for example, you would need all the frames as BufferedImage objects and you would combine custom painting with a Swing timer to update the displayed frame at a specified framerate.
if you search for "java swing animation" using google, I'm sure you can find the examples you need. And here is the trail about swing timers:
http://java.sun.com/docs/books/tutorial/uiswing/misc/timer.html

Rendering HTML output on Java 2D/3D Objects

Hi all, I want to read an HTML file and render an HTML output to the objects in Java 2D or Java 3D world.
For doing this, I am following the steps as
1> Read HTML file
2> Capture its output
3> Write captured output to the buffered image.
4> Use that buffered image to be shown on Java 2D/3D object as a texture.
How can I capture the HTML output?
If you have any other way, please suggest me.
Regards

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class captureHTML extends JPanel{
    public BufferedImage bufferedImage ;
    public Image image, capturedImage ;
    public Graphics2D g2d;
    public captureHTML() {
        capturedImage = capture("http://www.google.com");
        bufferedImage = new BufferedImage(1000,700,BufferedImage.TYPE_INT_RGB);
        g2d = bufferedImage.createGraphics();
        g2d.drawImage(capturedImage,0,0,this);
        image = bufferedImage.getScaledInstance
                    ((int)(-1),
                    (int)(-1),
                    Image.SCALE_SMOOTH) ;
    public Image capture(String str)
        URL url;
        JEditorPane jep = null;
        try {
            url = new URL(str);
            try {
                jep = new JEditorPane(url);
                jep.setContentType("text/html");
                jep.setPage(url);
            } catch (IOException ex) {
                ex.printStackTrace();
        } catch (MalformedURLException ex) {
            ex.printStackTrace();
        Image jepImage = jep.createImage(500,500);
        return jepImage;
    public void paint(Graphics g)
            System.out.println("paint called");
            if (getSize().width <= 0 || getSize().height <= 0)
                return;
            Graphics2D g2 = (Graphics2D) g;
            if (image != null && isShowing())
                g2.drawImage(image, 0, 0, this);
    public static void main(String args[])
        JFrame f = new JFrame();
        int w = 1000;
        int h = 700;
        f.setSize(w, h);
        f.getContentPane().setSize(w, h);
        f.getContentPane().add(new captureHTML());
        f.setDefaultCloseOperation(1);
        f.setVisible(true);
}I Implemented the code as db suggested, I think it will work. But at the moment without any error I am getting only blank black screen. Please have a look at capture( ) method. I think there is a problem in this method but I cant figure out whats going wrong.
Regards

Java Swing Telecom objects bean

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