[问答题] 下面程序中，在主窗口单击鼠标后，就会生成一个新窗口。 import java.awt.*; import java.awt.event.*; public class java3 e

[问答题] 下面程序中，在主窗口单击鼠标后，就会生成一个新窗口。

import java.awt.*;

import java.awt.event.*;

public class java3 extends Frame

java3()

super("java3");

addNotify();

addWindowListener(new WindowAdapter()

public void windowClosing(WindowEvent e)

System.exit(0);

);

Insets insets=getInsets();

setSize(insets.left+insets.right+150,

insets.top+insets.bottom+150);

this.addMouseListener(MouseEventHandler());

class MouseEventHandler implements MouseAdapter

public void mousePresse(MouseEvent evt)

Rectangle bounds=getBounds();

int x=evt.getX()+bounds.x;

int y=evt.getY()+bounds.y;

java3 m=newjava3();

m.setLocation(x,y);

m.show();

static public void main(Strin