java鼠标监听 MouseListener

[java]代码库

import java.awt.*;
import java.awt.event.*;

public class ThreeListener implements MouseMotionListener, MouseListener,
		WindowListener {
	// 实现了三个接口
	private Frame f;
	private TextField tf;

	public static void main(String args[]) {
		ThreeListener two = new ThreeListener();
		two.go();
	}

	public void go() {
		f = new Frame("Three listeners example");
		f.add(new Label("Click and drag the mouse"), "North");
		tf = new TextField(30);
		f.add(tf, "South"); // 使用缺省的布局管理器
		f.addMouseMotionListener(this); // 注册监听器MouseMotionListener
		f.addMouseListener(this); // 注册监听器MouseListener
		f.addWindowListener(this); // 注册监听器WindowListener
		f.setSize(300, 200);
		f.setVisible(true);
	}

	public void mouseDragged(MouseEvent e) {
		// 实现mouseDragged方法
		String s = "Mouse dragging : X=" + e.getX() + "Y = " + e.getY();
		tf.setText(s);
	}

	public void mouseMoved(MouseEvent e) {
	}

	// 对其不感兴趣的方法可以方法体为空
	public void mouseClicked(MouseEvent e) {
	}

	public void mouseEntered(MouseEvent e) {
		String s = "The mouse entered";
		tf.setText(s);
	}

	public void mouseExited(MouseEvent e) {
		String s = "The mouse has left the building";
		tf.setText(s);
	}

	public void mousePressed(MouseEvent e) {
	}

	public void mouseReleased(MouseEvent e) {
	}

	public void windowClosing(WindowEvent e) {
		// 为了使窗口能正常关闭，程序正常退出，需要实现windowClosing方法
		System.exit(1);
	}

	public void windowOpened(WindowEvent e) {
	}

	// 对其不感兴趣的方法可以方法体为空
	public void windowIconified(WindowEvent e) {
	}

	public void windowDeiconified(WindowEvent e) {
	}

	public void windowClosed(WindowEvent e) {
	}

	public void windowActivated(WindowEvent e) {
	}

	public void windowDeactivated(WindowEvent e) {
	}

}