gridlayoutdemo.java

学习Java的一些基本课件和源代码 对于初学者很有帮助的

//GridLayoutDemo.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class GridLayoutDemo extends JFrame implements ActionListener{
	private JButton buttons[];
	private final String names[]={"按钮1","按钮2","按钮3","按钮4","按钮5","按钮6"};
	private boolean toggle=true;;
	private Container container;
	private GridLayout grid1,grid2;
	
	public GridLayoutDemo()
	{
		super("网格布局示例");
		grid1=new GridLayout(2,3,5,5);
		grid2=new GridLayout(3,2);
		container=getContentPane();
		container.setLayout(grid1);
		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]);
		}
		setSize(300,150);
		setVisible(true);
		
	}
	public void actionPerformed(ActionEvent e)
	{
		if(toggle)
		container.setLayout(grid2);
		else 
			container.setLayout(grid1);
		toggle=!toggle;
		container.validate();
	}
	public static void main(String[] args)
	{
		GridLayoutDemo application=new GridLayoutDemo();
		application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}