Home/ Questions/Q 8332549
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-09T02:45:21+00:00

I have a folder with two files inside; the java .class file and the

  • 0

I have a folder with two files inside; the java .class file and the .html file. In my html file I call the .class file as an applet but it sais an error on the website its published to saying it can’t find the .class file. This puzzles me since they are in the same directory and I triple checked for spelling errors.

Here is my .html file…

<html>

<head>
<title>Applet</title>
</head>

<body>
Program<br />
<applet code="testing.class" width="300" height="300"/>
</body>

</html>

and here is my .class file…

import java.awt.Color;
import java.awt.Graphics;


public class testing extends java.applet.Applet{

    public void init(){

    }

    public void paint(Graphics g){
        g.drawOval(0,0,250,100);
        g.setColor(Color.RED);
        g.drawString("My Applet",10,50);
    }

}

My .class file is “testing.class” and my html file is “testingpage.html”

Here is the Full Entire error

load: class testing.class not found.
java.lang.ClassNotFoundException: testing.class
    at sun.plugin2.applet.Applet2ClassLoader.findClass(Applet2ClassLoader.java:252)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Plugin2ClassLoader.java:249)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Plugin2ClassLoader.java:179)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Plugin2ClassLoader.java:160)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Plugin2ClassLoader.java:690)
    at sun.plugin2.applet.Plugin2Manager.createApplet(Plugin2Manager.java:3045)
    at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Plugin2Manager.java:1497)
    at java.lang.Thread.run(Thread.java:680)
Exception: java.lang.ClassNotFoundException: testing.class
load: class testing.class not found.
java.lang.ClassNotFoundException: testing.class
    at sun.plugin2.applet.Applet2ClassLoader.findClass(Applet2ClassLoader.java:252)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Plugin2ClassLoader.java:249)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Plugin2ClassLoader.java:179)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Plugin2ClassLoader.java:160)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Plugin2ClassLoader.java:690)
    at sun.plugin2.applet.Plugin2Manager.createApplet(Plugin2Manager.java:3045)
    at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Plugin2Manager.java:1497)
    at java.lang.Thread.run(Thread.java:680)
Exception: java.lang.ClassNotFoundException: testing.class
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    The applet tag should be:

    <applet code=testing.class width="300" height="300" />

    Notice the change in the code attribute. Compare to the example code listed in the relevant Java Tutorial:

    <applet code=Applet1.class width="200" height="200">
Your browser does not support the <code>applet</code> tag.
</applet>

    The following is working for me.

    http://puu.sh/PebS

    TestingApplet.java

    import java.applet.Applet;

import java.awt.Color;
import java.awt.Graphics;

public final class TestingApplet extends Applet {

  public void paint(final Graphics g){
    g.drawOval(0, 0, 250, 100);
    g.setColor(Color.RED);
    g.drawString("My Applet", 10, 50);
  }
}

    testing-applet.html

    <html>
  <head>
    <title>Applet</title>
  </head>
  <body>
    Program <br />
    <applet code=TestingApplet.class width="300" height="300" />
  </body>
</html>

    If this is not working, I have two questions for you…

    • Did you save the Java as a .java file and compile it to produce the correct .class file?

    • Did you verify your browser is not caching an old incorrect version of the .html file?

    • Are your .class and .html files in the same directory?

    • 0