KeyStroke Event Handler Registration

Question

Any idea why the two cases in the sample code below have different output??? The different key registration methods seem to work for other keystrokes like ctrl-v and ctrl-c, but not Home and End.:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class Main{
public static void main(String args[]){
JFrame jf = new JFrame("Java Bug Test");
jf.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
jf.setBounds(30,30, 300, 300);
JTable jt = new JTable(5,5);
jf.getContentPane().add(jt,BorderLayout.CENTER);
KeyStroke ks = KeyStroke.getKeyStroke(KeyEvent.VK_HOME,0);
String actionName = "Home";
* In CASE ONE, the handler prints "null".
* In CASE TWO, the handler prints "Home".
//Comment out for CASE TWO, Uncomment for CASE ONE. (currently setup for CASE ONE).
jt.getInputMap().put(ks,actionName);
jt.getActionMap().put(actionName, new Handler());
//Comment out for CASE ONE, Uncomment for CASE TWO. (currently setup for CASE ONE).
//jt.registerKeyboardAction(new Handler(),actionName,ks,JComponent.WHEN_FOCUSED); //Comment
jf.setVisible(true);
static class Handler extends AbstractAction{
public void actionPerformed(ActionEvent ae){
System.out.println(ae.getActionCommand());
}

Answer 1

when my thread starts running the keylistener is not working.