Catch the tab keyevent??

Question

import java.awt.Component;
import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainFrame{
     public MainFrame(){
     public MainFrame(String name){
          show(name);
     Component component=null;
     public void show(String name){
          JFrame jf=new JFrame("Name :" + name);
          JPanel panel = new JPanel();
          panel.setLayout(new GridLayout(3,3));
          for (int i = 0; i < 8; i++) {
               final JButton button = new JButton("" + i);
               button.setActionCommand(""+i);
               button.setName("" + i);
               button.addKeyListener(new java.awt.event.KeyAdapter() {
                    public void keyPressed(java.awt.event.KeyEvent e) {
                         tabpressed(e);
               panel.add(button);
     jf.add(panel);
     jf.setSize(300, 200);
     jf.setVisible(true);
private void tabpressed(java.awt.event.KeyEvent evt) {
          System.out.println(evt.getKeyCode());
//IF "TAB" KEY PRESSED THAN PRINT
// HOW I CAN CHECK THIS
     public static void main(String args[]) {
          new MainFrame().show("Main");
i want to check in the tabpressed() method for "tab" key press
how i can check it?
when i press tab in the button no output is shown.

Answer 1

You have to turn off the tab key as the focus manager's forward traversal key. Add this line to your code and see what happens. Note that of necessity, tab will lose it's "tab" functionality:
        JFrame jf = new JFrame("Name :" + name);
        JPanel panel = new JPanel();
        // add these lines below:
        panel.setFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
                Collections.EMPTY_SET);
        panel.setLayout(new GridLayout(3, 3));