testmultilistener.java

我的一个ＪＡＶＡ作业

import java.awt.*;   import java.awt.event.*;
import javax.swing.*;
public class TestMultiListener implements MouseMotionListener,MouseListener {
	  JFrame f = new JFrame("多重监听器测试");
	  JTextField tf = new JTextField(30);
	  public TestMultiListener(){
	  f.getContentPane().add(new Label("请按下鼠标左键并拖动"), "North");
	 f.getContentPane().add(tf, "South");
	  f.getContentPane().setBackground(new Color(120,175,175));
	 f.addMouseMotionListener(this);
	 f.addMouseListener(this);
	 f.setSize(300, 200);	  f.setVisible(true);
	 f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); }
public static void main(String args[]) {   	
		TestMultiListener t = new TestMultiListener();
	  } 
	 public void mouseDragged(MouseEvent e) {
	    	String s = "鼠标拖动到位置（" + e.getX() + "," + e.getY() + ")";
	    	tf.setText(s);}
	public void mouseEntered(MouseEvent e) {
	    	String s = "鼠标已进入窗体";
	    	tf.setText(s);}
	public void mouseExited(MouseEvent e) {
	    	String s = "鼠标已移出窗体";
	    	tf.setText(s);}
	// 未使用的MouseMotionListener和MouseListener接口中的方法，也必须实现 
	public void mouseMoved(MouseEvent e) { }
	public void mousePressed(MouseEvent e) { }
	public void mouseClicked(MouseEvent e) { }
	public void mouseReleased(MouseEvent e) { }
}