buttontest.java

来自「一个J2SE的简单入门」· Java 代码 · 共 43 行

import Java.awt.*;
import Java.awt.event.*;
import Javax.swing.*;
public class ButtonTest {
	public static void main(String[] args)
	{
		ButtonFrame frame= new ButtonFrame(); //实例化一个	ButtonFrame类
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//添加关闭事件
		frame.show();//显示框架
	}
}
class ButtonFrame extends JFrame{
	public ButtonFrame()
	{
		setTitle("ButtonTest");
		setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT );
		ButtonPanel panel= new ButtonPanel();//实例化一个面板
		Container contentpanel= getContentPane();
		contentpanel.add(panel);
		
	}
	public static final int DEFAULT_WIDTH = 300;
	public static final int DEFAULT_HEIGHT= 200;
}
class ButtonPanel extends JPanel{
	public ButtonPanel()
	{
		setLayout(new BorderLayout());
		JButton yellowButton= new JButton("yellow");//实例化一个JButton按钮对象
		JButton redButton= new JButton("red");
		JButton blueButton= new JButton("blue");
		// add by wanghao 0402
		JButton greenButton = new JButton("green");
		//JButton b= new JButton("black");
		//JButton c= new JButton("pink");
		//JButton d= new JButton("brown");
		add(yellowButton,"South");//把按钮对象添加到面板中
		add(redButton,"North");
		add(blueButton,"West");
		add(greenButton,"East");
	}
}