java试用（2）applets, 嵌入在网页中的ui
程序
import java.awt.*;
import java.applet.*;
public class HelloWorldApplet extends Applet { //an applet
public void paint(Graphics g){
g.drawString ("Hello World!",20,20);
}
}
网页
<HTML>
<HEAD>
<TITLE> An Applet </TITLE>
</HEAD>
<BODY>
<applet code="HelloWorldApplet.class" width=200 height=40>
</applet>
</BODY>
</HTML>
编译
javac HelloWorldApplet.java
执行：
用ie打开网页即可
