jbuttondemo.java

来自「JAVA编程思想源代码 值得一下 很难找的」· Java 代码 · 共 75 行

package chapter11;

//ButtonClick.java

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

class ButtonPanel extends JPanel {
	public ButtonPanel() {
		//创建按钮
		JButton Button1 = new JButton("按钮一");
		JButton Button2 = new JButton("按钮二");

		//将按钮加入panel
		add(Button1);
		add(Button2);

		//创建监听器
		ButtonAction ButtonAction1 = new ButtonAction("按钮一");
		ButtonAction ButtonAction2 = new ButtonAction("按钮二");

		//注册监听器
		Button1.addActionListener(ButtonAction1);
		Button2.addActionListener(ButtonAction2);
	}

	public void paintComponent(Graphics g) {
		super.paintComponent(g);

		//显示用户的点击操作
		g.drawString("点击的是：" + ButtonText, 90, 120);
	}

	private class ButtonAction implements ActionListener {
		public ButtonAction(String text) {
			clicktext = text;
		}

		public void actionPerformed(ActionEvent event) {
			ButtonText = clicktext;
			repaint();
		}

		private String clicktext;
	}

	public String ButtonText = "";
}

class ButtonFrame extends JFrame {
	public static final int WIDTH = 300;

	public static final int HEIGHT = 200;

	public ButtonFrame() {
		setTitle("ButtonClick");
		setSize(WIDTH, HEIGHT);

		// 将panel加入到frame
		ButtonPanel panel = new ButtonPanel();
		Container contentPane = getContentPane();
		contentPane.add(panel);
	}

}

public class JButtonDemo {
	public static void main(String[] args) {
		ButtonFrame frame = new ButtonFrame();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);
	}
}