import java.awt.Graphics;
import java.awt.Event;
import java.awt.Color;
public class mouse extends java.applet.Applet
{
int num=0;//计数器初始化
int px,py;
public boolean mouseDown(Event evt,int x,int y)//鼠标按下事件
{
px=x;
py=y;//鼠标按下时的坐标
num++;//计数器加1
repaint();//重画窗口
return true;//返回true,表示事件处理过了
}
public void update(Graphics g)
{
g.setColor(getBackground());//以背景色取出一快区域
g.fillRect(10,300,200,60);
paint(g);//调用paint方法
}
public void paint(Graphics g)
{
g.setColor(Color.green);
g.drawString("当前鼠标的坐标是("+px+","+py+")",10,300);//输出当前鼠标的坐标
g.drawString("This is No."+num+"point",10,340);//输出点击次数
g.setColor(Color.red);//在鼠标点击位置画出一个红叉
g.drawLine(px-5,py-5,px+5,py+5);
g.drawLine(px+5,py-5,px-5,py+5);
}
}
<html>
<head>
<title>111</title>
</head>
<body>
<applet code="mouse.class"width=300 height=350></applet>
</body>
</html> |
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