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<td height="20" align="center"><font color="#FFFFFF">==<b>开发教室==</b></font></td>
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<p><span class="title">Java Applet 入门</span></p>
<p align="right"><a href="mailto:yy435@263.net">yy435</a></p>
<p align="right">太平洋网络学院</p>
<p align="center" class="green">第四天</p>
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<p align="left"><span class="green">鼠标事件例子2</span></p>
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<td><applet code="Mouse.class" width="400" height="200">
</applet></td>
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<p>这个例子的源代码如下：</p>
<pre>
import java.awt.*;
import java.applet.* ;
public class Mouse extends Applet
{
String msg="";
//定义一条字符串变量，存储要输出的消息。
public boolean mouseEnter(Event e,int x,int y)
{
msg="你进来了，真讨厌！拿开！拿开！！把鼠标拿开吧！";
repaint(); //重新绘画屏幕
return true; //返回真的布尔值
}
public boolean mouseExit(Event e,int x,int y)
{
msg="你把鼠标移开了，别走嘛！为什么不把鼠标移进来呀？";
repaint();
return true;
}
public void paint(Graphics g)
{
g.drawString (msg,4,20); //显示消息
}
}
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