appletmouselistenerdemo.java

来自「JAVA编程思想源代码 值得一下 很难找的」· Java 代码 · 共 62 行

package chapter12;

import java.applet.Applet;
import java.awt.Button;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

public class AppletMouseListenerDemo extends Applet {
	String str = "鼠标事件测试";

	public void init() {
		Button b = new Button("鼠标事件的处理");
		add(b);
		mouseListener m = new mouseListener();
		b.addMouseListener(m); //为按钮添加鼠标事件监视器
	}

	public void start() {
	}

	public void stop() {
	}

	public void destroy() {
	}

	public void paint(Graphics g) {
		g.setColor(Color.red);
		g.drawString(str, 20, 60);
	}

	class mouseListener implements MouseListener {

		public void mouseReleased(MouseEvent m) {
			str = "鼠标释放";
			repaint();
		}

		public void mouseClicked(MouseEvent m) {
//			str = "鼠标单击";
//			repaint();
		}

		public void mouseEntered(MouseEvent m) {
			str = "鼠标进入按钮范围";
			repaint();
		}

		public void mousePressed(MouseEvent m) {
			str = "鼠标按下";
			repaint();
		}

		public void mouseExited(MouseEvent m) {
			str = "鼠标离开按钮范围";
			repaint();
		}
	}
}