AppletViewer - "applet not initialized"

Question

My code compiles and works just fine in both my browser and Eclipse, but for some reason the AppletViewer just won't work with my VERY simple code. When I try to run it with appletviewer FirstApplet.html, the AppletViewer window appears as expected, but the upper-left part of the window just says "Applet" and the bottom-left part of the window says "Start: applet not initialized"

What could be the problem here? (Again, it works in my browser and Eclipse)

Thank you for any help! :)

FirstApplet.java

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

public class FirstApplet extends Applet {
    public void paint(Graphics g){
        g.drawString("This is my first Java Applet!", 20, 30);
    }
}

FirstApplet.html

<html>
    <head>
        <title>FirstApplet</title>
    </head>

    <body>
        <applet
            codebase    = "."
            code        = "FirstApplet.class"
            name        = "FirstApplet"
            width       = "640"
            height      = "480"
            hspace      = "0"
            vspace      = "0"
            align       = "middle"
        >

        </applet>
    </body>
</html>

FirstApplet.html and FirstApplet.java - Are they on the same directory ? — exexzian, Jun 17 '13 at 05:46
@Bingo Yes, they are. And I've also compiled FirstApplet.Java so there's a FirstAPplet.class file in the same folder as well. — Rick_Sch, Jun 17 '13 at 05:52
1) there miss some code for visibily of Applet on the screen 2) use JApplet, 3) put there JPanel and custom painting in Swing is done by using paintComponent — mKorbel, Jun 17 '13 at 06:06
@Rick_Sch I still doubt that html and class file are not on the same folder as I checked your prog and it works fine check out : http://i39.tinypic.com/ojpjiv.png — exexzian, Jun 17 '13 at 06:12
1) Why code an applet? If it is due due to spec. by teacher, please refer them to [Why CS teachers should stop teaching Java applets](http://programmers.blogoverflow.com/2013/05/why-cs-teachers-should-stop-teaching-java-applets/). 2) Why AWT rather than Swing? See this answer on [Swing extras over AWT](http://stackoverflow.com/a/6255978/418556) for many good reasons to abandon using AWT components. If you need to support older AWT based APIs, see [Mixing Heavyweight and Lightweight Components](http://www.oracle.com/technetwork/articles/java/mixing-components-433992.html). — Andrew Thompson, Jun 17 '13 at 07:09
@Bingo They are definitely in the same folder along with the other standard Eclipse mess. http://s23.postimg.org/c7rmn69aj/First_Applet.jpg — Rick_Sch, Jun 17 '13 at 13:22
@AndrewThompson This is not from a teach, but from a 5 year old book called Beginning Java Programming. If what I'm doing is incorrect, it's because I don't know any better and I'm just doing what the book tells me. Is there a better way to embed Java programs into a website these days? Also, thanks for the Swing vs. AWT suggestion! :) — Rick_Sch, Jun 17 '13 at 13:24
*"This is not from a teach, but from a 5 year old book"* That book is not something you should be learning from. Swing was introduced at least *5 years* before that, and a book teaching AWT at that stage is ..unforgivable. Use the [Swing tutorials](http://docs.oracle.com/javase/tutorial/uiswing/) (or a more recent book). — Andrew Thompson, Jun 17 '13 at 14:24
You're welcome. Please drop dealing with both AWT & applets for the moment, and start with Swing based `JFrame` applications. Not only am I much more willing to help with them, but me, and other people willing to help, can actually *remember* enough details about Swing to *provide* useful tips. Later move on to the Swing based `JApplet`. But *only* if you need an app. embedded in a web page. That turns out to be very, *very*, ***very*** rarely. — Andrew Thompson, Jun 17 '13 at 17:27

score 3 · Answer 1 · answered Jun 17 '13 at 20:42

I figured it out! It was an Eclipse problem after all!

I wrote and compiled the code in Eclipse. Eclipse's internal version of the AppletViewer worked just fine, and it worked just fine to open the HTML file that I made in my browsers.

The applet didn't work in the actual AppletViewer, however, until I compiled the code using something other than Eclipse. It appears that for some reason AppletViewer didn't like the .class file that Eclipse generated.

Mystery solved!

score -1 · Answer 2 · edited Oct 31 '17 at 11:59

I was experiencing the same problem.

First of all I had removed public from my class.That lead fine compilation but no initialization in applet:(.

Next I changed it public and the code threw an error to me.

To solve error I renamed my source code as per my public class name then I simply ran the code through appletviewer which executed all fine.

I apologize for Inconvenient explanation though. Here are the Snippets of three Stage of my problem Solving

Stage 1

Stage 2

Solution Stage

I have tried to demonstrate the aspect of code changes as well :) and the RHS pane is the code webpage.

Simply keep the name of class and main class containing Source same.

Hmm , I apologize for inconvenience I will try my best to discontinue the same :) — Reitsu Y, Nov 06 '17 at 04:44

AppletViewer - "applet not initialized"

2 Answers2