GridLayout

package gui;

 

 

import java.awt.*;

import java.awt.event.*;

 

import javax.swing.*;

/**

 * 编写一个Java GUI应用程序，窗口标题为“GridLayout”，

 * 窗口布局如下图A所示，在图A窗口中单击任意一个Button，

 * 网格的划分方式会变化为图B；在图B窗口中单击任意一个Button，

 * 网格的划分方式会变化为图A。（25分）

 * @since 2010-9-20

 * @start 12:34

 * @end 12:55

 * @version 0.1

 * @author allchin

 * @serial 1

 * */

public class Four_LayoutChanger {

public static void main(String[] args){

LayoutChanger lc=new LayoutChanger();

lc.init();

lc.start();

}

}

class LayoutChanger extends JFrame implements ActionListener{

GridLayout gl=new GridLayout(2,3),

  gl2=new GridLayout(3,2);

Button btn1=new Button("one"),

  btn2=new Button("two"),

  btn3=new Button("three"),

  btn4=new Button("four"),

  btn5=new Button("five"),

  btn6=new Button("six");

  

  

public void init(){

 

this.getContentPane().setLayout(gl);

this.setBounds(111, 111, 800, 600);

this.setVisible(true);

this.validate();

this.getContentPane().add(btn1);

this.getContentPane().add(btn2);

this.getContentPane().add(btn3);

this.getContentPane().add(btn4);

this.getContentPane().add(btn5);

this.getContentPane().add(btn6);

btn1.addActionListener(this);

btn2.addActionListener(this);

btn3.addActionListener(this);

btn4.addActionListener(this);

btn5.addActionListener(this);

btn6.addActionListener(this);

}

public void start(){

}

 

@Override

public void actionPerformed(ActionEvent e) {

this.getContentPane().removeAll();

 

if(this.getContentPane().getLayout().equals(gl)){

this.getContentPane().setLayout(gl2);

}

else

if(this.getContentPane().getLayout().equals(gl2)){

this.getContentPane().setLayout(gl);

}

 

 

this.getContentPane().add(btn1);

this.getContentPane().add(btn2);

this.getContentPane().add(btn3);

this.getContentPane().add(btn4);

this.getContentPane().add(btn5);

this.getContentPane().add(btn6);

this.getContentPane().validate();

this.validate();

}

}