这个程序在eclips下编译不通过，是啥毛病啊？
import   java.awt.*;
import   java.awt.event.*;
import   java.applet.*;

public   class   Applet1   extends   Frame   implements   ActionListener   {

Button   bt1,bt2;
Label   11;
Applet1(){
super( "Window1 ");
addWindowListener(this);
setSize(400,200);
bt1=new   Button( "111 ");
bt2=new   Button( "222 ");
11=new   Label( "点击任意按钮 ");
setLayout(new   FlowLayout());
add(11);
add(bt1);
add(bt2);
bt1.addActionListener(this);
bt2.addActionListener(this);
show();
}
public   void   windowClosing(WindowEvent   e)   {
System.exit(0);
}
public   void   windowOpen(WindowEvent   e);
public   void   windowClose(WindowEvent   e);
public   void   windowIconified(WindowEvent   e);
public   void   windowDeiconified(WindowEvent   e);
public   void   windowActivate(WindowEvent   e);
public   void   windowDeactivate(WindowEvent   e);
public   static   void   main(String   args[]){
new   Applet1();
}
public   void   actionPerformed(ActiveEvent   e){
11.setText( "你按下的是 "+e.getActionCommand()+ " ");
}

}


------解决方案--------------------
import java.awt.*;
import java.awt.event.*;
import java.applet.*;

class Test extends Frame implements ActionListener {

Button bt1,bt2;
Label l11;
Test(){
super( "Window1 ");

setSize(400,200);
bt1=new Button( "111 ");
bt2=new Button( "222 ");
l11=new Label( "点击任意按钮 ");
setLayout(new FlowLayout());
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
add(l11);
add(bt1);
add(bt2);
bt1.addActionListener(this);
bt2.addActionListener(this);
show();
}


public static void main(String args[]){
new Test();
}

public void actionPerformed(ActionEvent e) {
l11.setText( "你按下的是 "+e.getActionCommand()+ " ");
}


一、利用适配器WindowAdapter,他实现了接口中所有方法，但是方法体是空的，所以你只要覆盖你需要覆盖的方法就可以了
二、不要用数字做变量名
三、最后public void actionPerformed(ActionEvent e)中，是ActionEvent不是ActiveEvent，你把我累死了，我用IDE工具去编辑才发现这个问题