清华大学：JAVA教学课件：9-8

程序9-8
import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
public class HwMouse extends Applet implements MouseListener {
int mouseX = 25;
int mouseY = 25;
// 注册鼠标事件监听程序
public void init() {
addMouseListener(this);
}
public void paint (Graphics g) {
g.drawString("Hello World!",mouseX,mouseY);
}
public void mousePressed(MouseEvent evt) {
mouseX = evt.getX();
mouseY = evt.getY();
repaint();
}
public void mouseClicked (MouseEvent e) {}
public void mouseEntered (MouseEvent e) {}
public void mouseExited (MouseEvent e) {}
public void mouseReleased (MouseEvent e) {}
}