swing的问题

Question

import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import com.bruceeckel.swing.Console;public class TrackEvent extends JApplet
{
private Map h=new HashMap();
private class MyButton extends JButton
{
FocusListener fl=new FocusListener()
{
public void focusGained(FocusEvent e)
{
report("focusGained",e.paramString());
}
public void focusLost(FocusEvent e)
{
report("focusLost",e.paramString());
}
};
public void report(String field,String msg)
{
((JTextField)h.get(field)).setText(msg);
}
MyButton(Color color , String label)
{
super(label);
setBackground(color);
addFocusListener(fl);
}
}
public void init()
{
Container cp=getContentPane();
cp.setLayout(new GridLayout(2,2));
JTextField tf1=new JTextField("foucusGained",100);
JTextField tf2=new JTextField("foucusLost",100);
h.put("foucusGained",tf1);
h.put("foucusLost",tf2);
MyButton b1=new MyButton(Color.BLUE,"test1");
MyButton b2=new MyButton(Color.RED,"test2");
cp.add(tf1);cp.add(tf2);cp.add(b1);cp.add(b2);
}
public static void main(String[] args)
{
Console.run(new TrackEvent(),500,500);
}
}不知道异常出现在哪里，一连串的英文看的我晕晕乎乎的。