jbuttondemo.java

本java源程序包括了大量的学习程序（共27章）方便大家学习

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JButtonDemo extends JFrame 
{
    private JButton button1, button2;
    public JButtonDemo(){
    	super("测试按钮类");
    	setSize(250, 100);
        
        //设置外观
		try
		{
			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
		}catch(Exception e){}
        //获取内容面板 
	    Container container = getContentPane();
	    //设置内容面板的布局管理器
	    container.setLayout(new GridLayout(1, 2));
	    container.setBackground(Color.YELLOW);
	    
	    //创建按钮对象
	    button1 = new JButton("按钮1");
	    button1.setFont(new Font("Serif", Font.PLAIN, 12));
	    
	    ImageIcon img1 = new ImageIcon("wave.gif");
	    ImageIcon img2 = new ImageIcon("stop.gif");
	    button2 = new JButton("按钮2", img1);
	    button2.setRolloverIcon(img2);
	    button2.setFont(new Font("Serif", Font.PLAIN, 12));
	    
	    //为组件注册监听器
	    ButtonHandler handler = new ButtonHandler();
	    button1.addActionListener(handler);
	    button2.addActionListener(handler);
	    
	    //将各种组件添加到内容面板
	    container.add(button1);
	    container.add(button2);
	    
	    setVisible(true);
	    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    
	public static void main(String[] args) 
	{
		JButtonDemo demo = new JButtonDemo();
		demo.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
    
	private class ButtonHandler implements ActionListener
	{
		public void actionPerformed(ActionEvent event)
		{
			JOptionPane.showMessageDialog(JButtonDemo.this,
					"你按了: " + event.getActionCommand());
		}
	}
}