testmultilistener.java

来自「这是一张java应用教程的随书光盘」· Java 代码 · 共 34 行

import java.awt.*;
import java.awt.event.*;
public class TestMultiListener implements MouseMotionListener, MouseListener {
	  Frame f = new Frame("多重监听器测试");
	  TextField tf = new TextField(30);
	  public TestMultiListener(){
	    	f.add(new Label("请按下鼠标左键并拖动"), "North");
	    	f.add(tf, "South");
	    	f.setBackground(new Color(120,175,175));
	    	f.addMouseMotionListener(this);
	    	f.addMouseListener(this);
	    	f.setSize(300, 200);	 f.setVisible(true);
	  }
	  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);
	}
	public void mouseMoved(MouseEvent e) { }
	public void mousePressed(MouseEvent e) { }
	public void mouseClicked(MouseEvent e) { }
	public void mouseReleased(MouseEvent e) { }
}