JButton的一个例子

/**
 * 这个程序利用GridLayout来实现一个界面，然后当按每一个按钮的时候，按钮的颜色发生变化
 */

/**
 * @author Rollen Holt
 * @version 25/5/2011
 */
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class Gridlayout extends JFrame implements ActionListener{
	JButton buttonBlue;
	JButton buttonRed;
	JButton buttonWhite;
	JButton buttonGreen;
	JButton buttonYellow;
	JButton buttonBlack;
	JButton buttonOrange;
	JButton buttonPurple;
	JButton buttonPink;
	JButton buttonLightBlue;
	
	Panel panel;
	
	Gridlayout(){
			setTitle("GridLayout");
			setSize(500,500);
			setVisible(true);
			setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			
			buttonBlue=new JButton("Blue");
			buttonRed=new JButton("Red");
			buttonWhite=new JButton("White");
			buttonGreen=new JButton("Green");
			buttonYellow=new JButton("Yellow");
			buttonBlack=new JButton("Black");
			buttonOrange=new JButton("Orange");
			buttonPurple=new JButton("Purple");
			buttonPink=new JButton("Pink");
			buttonLightBlue=new JButton("LightBlue");
			
			panel=new Panel();
			panel.setLayout(new GridLayout(5,2));
			panel.add(buttonBlue);
			panel.add(buttonRed);
			panel.add(buttonWhite);
			panel.add(buttonBlack);
			panel.add(buttonGreen);
			panel.add(buttonYellow);
			panel.add(buttonOrange);
			panel.add(buttonLightBlue);
			panel.add(buttonPink);
			panel.add(buttonPurple);
			add(panel);
			
			buttonBlue.addActionListener(this);
			buttonRed.addActionListener(this);
			buttonLightBlue.addActionListener(this);
			buttonWhite.addActionListener(this);
			buttonPink.addActionListener(this);
			buttonGreen.addActionListener(this);
			buttonOrange.addActionListener(this);
			buttonPurple.addActionListener(this);
			buttonYellow.addActionListener(this);
			buttonBlack.addActionListener(this);
			
		}
	public void actionPerformed(ActionEvent event){
			if(event.getSource()==buttonBlue){
				buttonBlue.setBackground(Color.BLUE);
			}
			if(event.getSource()==buttonBlack){
				buttonBlack.setBackground(Color.BLACK);
			}
			if(event.getSource()==buttonRed){
				buttonRed.setBackground(Color.RED);
			}
			if(event.getSource()==buttonPink){
				buttonPink.setBackground(Color.PINK);
			}
			if(event.getSource()==buttonOrange){
				buttonOrange.setBackground(Color.ORANGE);
			}
			if(event.getSource()==buttonYellow){
				buttonYellow.setBackground(Color.YELLOW);
			}
			if(event.getSource()==buttonPurple){
				buttonPurple.setBackground(new Color(128,0,255));
			}
			if(event.getSource()==buttonLightBlue){
				buttonLightBlue.setBackground(Color.CYAN);
			}
			if(event.getSource()==buttonWhite){
				buttonWhite.setBackground(Color.WHITE);
			}
			if(event.getSource()==buttonGreen){
				buttonGreen.setBackground(Color.GREEN);
			}
		}

	public static void main(String[] args){
		new Gridlayout();
	}
}