How to change 'z' key into 'A' key with key blinding?

Question

How to change 'z' key into 'A' key?
Although txt.setText("A") can set the text field with 'a', but it is not original input from keyboard because it cant trigger the key listener.
It is possible to perform key pressing more than a key in same time? Example, perform 'q' & 'w' keys pressing at the same time.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Main
{   public static void main(String[] args)
    {   JFrame f = new JFrame("Test");
        Test GUI = new Test();
        GUI.setOpaque(true);
        f.setContentPane(GUI);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.pack();
        f.setVisible(true);
class Test extends JPanel
{   JTextArea txta = new JTextArea(10,20);
    JTextField txt = new JTextField(10);
    JScrollPane sp_txta = new JScrollPane(txta);
    public Test()
    {   this.setPreferredSize(new Dimension(400,300));
        setLayout(new BorderLayout());
        txta.setEditable(false);
        add(sp_txta, BorderLayout.CENTER);
        add(txt, BorderLayout.PAGE_END);
        Action testAction = new AbstractAction()
        {   public void actionPerformed(ActionEvent ae){ txt.setText("A"); }
        txt.getInputMap().put(KeyStroke.getKeyStroke('z'), "test");    //Change z into A
        txt.getActionMap().put("test", testAction);
        txt.addKeyListener
        (   new KeyListener()
            {   public void keyPressed(KeyEvent e){ txta.append(e.getKeyChar() + " key is pressed \n"); }
                public void keyReleased(KeyEvent e){ txta.append(e.getKeyChar() + " key is released \n"); }
                public void keyTyped(KeyEvent e){ txta.append(e.getKeyChar() + " key is typed \n"); }
}Edited by: 835972 on Feb 11, 2011 8:11 AM

Answer 1

It is possible to perform key pressing more than a key in same time? Example, perform 'q' & 'w' keys pressing at the same time.With r.keyPress method, it only can perform single key pressed at a time. Do you have any idea how to perform multiple key pressed at a time?The javadoc for Robot.keyPress suggests ( "+The key should be released using the keyRelease method+" ) that the key remains "pressed" until you keyRelease(...) it. So, press the keys sequentially:
theRobot.keyPress(KeyEvent.VK_Q);
theRobot.keyPress(KeyEvent.VK_W);
// At this stage both Q and W are pressed "in same time"
... // do stuff
theRobot.keyRelease(KeyEvent.VK_W);
// At this stage, only Q is pressedI suspect that in real life, unless you're a very gifted musician, you don't really press keys "at the same time" (under the time resolution of a keyboard, which I imagine is around a few milliseconds).