網格布局(GridLayout) - Iitb

網格布局(GridLayout)

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class GridLayoutDemo extends JFrame implements ActionListener{

/**

* @param args

*/

private JButton buttons[];

private final String names[]={"one","two","three","four","five","six"};

private boolean toggle=true;

private Container container;

private GridLayout layout1,layout2;

public GridLayoutDemo(){

super("GridLayout 布局管理的應用");

layout1=new GridLayout(2,3,5,5);

layout2=new GridLayout(3,2);

container=getContentPane();

container.setLayout(layout1);

setSize(600,300);

setVisible(true);

buttons=new JButton[names.length];

for(int count=0;count<names.length;count++){

buttons[count]=new JButton(names[count]);

buttons[count].addActionListener(this);

container.add(buttons[count]);

}

}

@Override

public void actionPerformed(ActionEvent e) { //處理按鈕事件代碼

// TODO Auto-generated method stub

if(toggle)

container.setLayout(layout2);

else

container.setLayout(layout1);

toggle=!toggle;

container.validate(); //使容器和它的所有子元件有效地顯示

}

public static void main(String[] args) {

// TODO Auto-generated method stub

GridLayoutDemo application = new GridLayoutDemo();

application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

}