import javax.swing.*; import java.awt.event.*; import java.awt.*;public class KeyTest { public static void main(String[] args) { JFrame f = new JFrame(); JTextField field = new JTextField(); field.addKeyListener(new KeyListener() { public void keyPressed(KeyEvent e) { } public void keyReleased(KeyEvent e) {
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;public class KeyTest
{ public static void main(String[] args)
{
JFrame f = new JFrame(); JTextField field = new JTextField();
field.addKeyListener(new KeyListener()
{
public void keyPressed(KeyEvent e)
{ }
public void keyReleased(KeyEvent e)
{
}
public void keyTyped(KeyEvent e)
{
if(e.getKeyChar()=='A')
e.setKeyChar('\u0000');
}
});
f.getContentPane().add(field);
f.setSize(200,200);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
}
}