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<td height="20" align="center"><font color="#FFFFFF">==<b>開發教室==</b></font></td>
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<p><span class="title">Java Applet 入門</span></p>
<p align="right"><a href="mailto:yy435@263.net">yy435</a></p>
<p align="right">太平洋網絡學院</p>
<p align="center" class="green">第四天</p>
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<p align="left"><span class="green">鼠標事件例子2</span></p>
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<td><applet code="Mouse.class" width="400" height="200">
</applet></td>
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<p>這個例子的源代碼如下：</p>
<pre>
import java.awt.*;
import java.applet.* ;
public class Mouse extends Applet
{
String msg="";
//定義一條字符串變量，存儲要輸出的消息。
public boolean mouseEnter(Event e,int x,int y)
{
msg="你進來了，真討厭！拿開！拿開！！把鼠標拿開吧！";
repaint(); //重新繪畫屏幕
return true; //返回真的布爾值
}
public boolean mouseExit(Event e,int x,int y)
{
msg="你把鼠標移開了，別走嘛！為什么不把鼠標移進來呀？";
repaint();
return true;
}
public void paint(Graphics g)
{
g.drawString (msg,4,20); //顯示消息
}
}
</PRE>
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