Question

package javaapplication3;

import java.applet.Applet;
import java.awt.*;

/*<applet code="NewApplet" width="3000" height="80">
<param name="fontName" value="Courrier"></applet>*/
public class NewApplet extends Applet{
    int c,d;

    public void start(){
      c=9;d=8;
    }

    public void paint(Graphics g)
    {
      g.drawString("Muliplication"+c*d,0,10);
    }
}

I have read many advantages/disadvantages of Java applet in many sites, but still I want to know some things:

Is it necessary for a user to have JDK and JRE installed on his/her system to run applet on web browser?
Will this program makes the browser to download these two packages (java.applet.Applet,java.awt.*)?
Is using Applet good or bad?

Answer 1

Only the JRE
No, they are included in the JRE
Bad, Java applets aren t a recommended web technology anymore and probably many of your users will not see them properly. Java applets should be reserved for some special applications and probably Intranet only.

目前在贾瓦的传单中,大多数是用超文本5、Javascript、Ajax等书写的“Web 2.0-et”,而不需要任何插手。

Answer 2

JRE not JDK
Check this out because it seems you have not understood the concept of java packages en.wikipedia.org/wiki/Java_package
Read this: http://www.ehow.com/info_12152621_advantages-disadvantages-using-java-applets.html

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