清华大学：JAVA教学课件：5-15

程序5-16
import java.awt.*;
import java.awt.event.*;
public class TwoListenInner{
// 不影响其他成员变量和方法
public void go(){
......
f.addMouseMotionListener(new TwoListenInner$MouseMotionHandler(this));
......
}
class TwoListenInner$MouseMotionHandler extends MouseMotionAdapter{
private TwoListenInner this$0;
// 编译器自动生成结构
TwoListenInner$MouseMotionHandler(TwoListenInner this$0);
this.this$0 = this$0;
}
public void mouseDragged (MouseEvent e){
String s="Mouse dragging,X="+e.getX() +"Y="+e.getY();
this$0.tf.setText(s);
}
}