KeyPressed(java.awt.KeyEvent e) is not working with jdk1.4 while working in 1.3 & 1.2

>>keyPressed method is not calling when hitting alt
Not sure what you mean. You mean when pressing <Alt>+<the mnemonic for the button>
>>or spacebar key
when the butotn has the focus I hope

Or are you not at all talking about a button?

It would be a lot more easy to help you if you would react on our comments.
(See also your previous open Q: http://www.experts-exchange.com/Programming/Programming_Languages/Java/Q_21036345.html)

i know it may sound silly, but have you added a listener to the component?

[component].addKeyListener(this) < ------ if implementing the KeyListener interface  

or if your subclassing the KeyListener class use:

[component].addKeyListener(new MyKeyListener(this));

public void keyPressed(KeyEvent key)
{
      if ( key.getKeyCode() == KeyEvent.VK_ALT )
      {
            doSomething();

      }
}

if you are trying to use an ALT + [key] combination, just include an additional if statement such


public void keyPressed(KeyEvent key)
{
      if ( key.getKeyCode() == KeyEvent.VK_ALT )
      {
            if ( key.getKeyCode() == KeyEvent.VK_P)
                  doSomething();

      }
}

hope it helps,

cheers affa

Hi johnny,
Thanks for ur suggestion but i tried this way earlier also and now also but not working.Actually I have a class like CityName.java.In this i am having one IvjEventHandler class where i have implementing keyListener. method keyPressed and keyreleased & key Typed all are written in IvjHandler class. In main class i have call a button bean class in which five buttons are there.when i am pressing Alt+I (Mnemonic) then keyPress are not working. I have written this.addKeyListener(object of IvjEventhandler) in initialisation() method of Cityname class.
But still it's not working.

I think I have the solution (if you're still interested):

1) Add the following function to your CityName class:

    private void addKeyListenerRecursively(Component c, KeyListener listener)
    {
        //To be on the safe side, try to remove KeyListener first
        //just in case it has been added before.
        //If not, it won't do any harm
        c.removeKeyListener(listener);
        //Add KeyListener to the Component passed as an argument
        c.addKeyListener(listener);

        if (c instanceof Container) {
            //Component c is a Container. The following cast is safe.
            Container cont = (Container)c;
            //Get the Container's array of children Components.
            Component[] children = cont.getComponents();

            //For every child repeat the above operation.
            for (int i = 0; i < children.length; i++) {
                addKeyListenerRecursively(children[i], listener);
            }
        }
    }

2)
and instead of writing

        this.addKeyListener(object of IvjEventhandler);

write

        addKeyListenerRecursively(this, object of IvjEventhandler);

Let me know

Here's a demo app if you're interested:

/*
 * KeyPressDemo.java
 *
 */

import java.awt.event.*;
import java.awt.*;
/**
 *
 */
public class KeyPressDemo extends javax.swing.JFrame {
   
    /** Creates new form KeyPressDemo */
    public KeyPressDemo() {
        initComponents();
        // Don't write this                                                             // <<<<<<<<<<<<<<<<<<<< !!!!
        //addKeyListener(new MyKeyListener());
        // but this:
        addKeyListenerRecursively( this, new MyKeyListener() );
    }
   
    private void initComponents() {
        jButton1 = new javax.swing.JButton();

        getContentPane().setLayout(new java.awt.FlowLayout());

        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosing(java.awt.event.WindowEvent evt) {
                exitForm(evt);
            }
        });

        jButton1.setText("Button 1");
        getContentPane().add(jButton1);

        pack();
    }
   
    private void exitForm(java.awt.event.WindowEvent evt) {
        System.exit(0);
    }
   
    public static void main(String args[]) {
        new KeyPressDemo().show();
    }
   
    private javax.swing.JButton jButton1;

    private void addKeyListenerRecursively(Component c, KeyListener listener)
    {
        //To be on the safe side, try to remove KeyListener first
        //just in case it has been added before.
        //If not, it won't do any harm
        c.removeKeyListener(listener);
        //Add KeyListener to the Component passed as an argument
        c.addKeyListener(listener);

        if (c instanceof Container) {
            //Component c is a Container. The following cast is safe.
            Container cont = (Container)c;
            //Get the Container's array of children Components.
            Component[] children = cont.getComponents();

            //For every child repeat the above operation.
            for (int i = 0; i < children.length; i++) {
                addKeyListenerRecursively(children[i], listener);
            }
        }
    }
   
    public class MyKeyListener extends KeyAdapter {
        public MyKeyListener() { }
        public void keyPressed(KeyEvent e) {
            System.out.println("Key pressed");
        }
        public void keyReleased(KeyEvent e) {
            System.out.println("Key released");
        }
        public void keyTyped(KeyEvent e) {
            System.out.println("Key typed");
        }
    }
}

anirudh4uonly, here try this. it works test for ALT and then the number 1, when alt is pressed the background color is changed to blue and if 1 is pressed the color changes to red.  i think this is kinda what your after;

import java.awt.*;
import java.awt.event.*;

class Key extends Frame
{
      public Key()
      {
            this.setInterface();
      }

      private void setInterface()
      {
            this.setLayout(null);
            this.setBounds(100,100,400,400);
            this.addKeyListener(new MyKeyListener(this));
            this.setVisible(true);
      }
}

class MyKeyListener extends KeyAdapter
{
      Key reference;
      boolean isALT;

      public MyKeyListener(Key reference)
      {
            this.reference = reference;
            this.isALT = false;
      }

      public void keyPressed(KeyEvent key)
      {
            if ( key.getKeyCode() == KeyEvent.VK_ALT )
            {
                  this.isALT = true;
                  this.reference.setBackground(Color.blue);
            }

            if ( this.isALT == true )
            {
                  if ( key.getKeyCode() ==  KeyEvent.VK_1 )
                  {
                        this.reference.setBackground(Color.red);
                        this.isALT = !this.isALT;
                  }
            }

      }
}

class test
{
      public static void main(String args[])
      {
            new Key();
      }
}