buttondemo.java

来自「本书属于《开发专家之 Sun ONE》系列丛书」· Java 代码 · 共 45 行

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

public class ButtonDemo extends JFrame 
{
	Icon icon = new ImageIcon("flight.gif");

	JButton noargButton = new JButton(),
				textButton = new JButton("text"),
				textIconButton = new JButton("text", icon),
				iconButton = new JButton(icon);

	public ButtonDemo() 
	{
		//设置框架窗口标题
    	super("JButton Demo");
		//获取内容窗格容器
	    Container contentPane = getContentPane();

		//设置内容窗格容器的布局管理器为FlowLayout
		contentPane.setLayout(new FlowLayout());
		//把四个JButton组件加入到内容窗格容器中
		contentPane.add(noargButton);
		contentPane.add(textButton);
		contentPane.add(iconButton);
		contentPane.add(textIconButton);
		//显示框架窗口
		pack();
    	setVisible(true);
	}
	//应用程序的入口方法
	public static void main(String args[]) 
	{
		 ButtonDemo frame=new ButtonDemo();
		 //添加框架窗口的事件监听（监听关闭框架窗口事件）
		 frame.addWindowListener(new WindowAdapter() {
		    public void windowClosing(WindowEvent e) {
		        //正常推出Java虚拟机
		        System.exit(0);
		    }
		});
	}
}