applet fail

**wolfgar** · January 19th, 2010, 02:19 PM

i decided to test a applet i made in fire fox,
it worked fine b4 in the eclipse applet test thing
but as soon as i set up the html file and ran it , it
decided to throw errors at me ><

what does this even mean?

java.lang.NullPointerException
at sun.plugin2.applet.Plugin2Manager.findAppletJDKLev el(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unk nown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionR unnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.NullPointerException

heres the html i made , encase thats the problem

<html>
<head>
<title>Test Applet</title>
</head>
<body>
<APPLET code="main\UI" archive="test.jar" width="500" height="400">
you need to have java installed to use this applet  
</APPLET>
</body>
</html>

**wolfgar** · January 20th, 2010, 07:55 AM

i have been searching and found no info that fixes this yet ><
the closest was when i got a thing that said i needed to sign the app
it gave info on how to self sign it but that still didnt help any .

does any 1 know what could be wrong
( will upload a jar soon that works in the applet viewer but not in the browser, also will contain the source )

**Json** · January 20th, 2010, 08:54 AM

Do you not have to specify the .class ending in the applet tag?

<html>
<head>
<title>Test Applet</title>
</head>
<body>
<APPLET code="main\UI.class" archive="test.jar" width="500" height="400">
you need to have java installed to use this applet  
</APPLET>
</body>
</html>

// Json

**wolfgar** · January 20th, 2010, 08:59 AM

idk if i need it or not , cause i've tried this 1 with and w/o the .class ( same results though )

<applet code="main.UI.class" archive="test.jar" width="500" height="300">
you need to have java installed to use this applet  
</APPLET>

**helloworld922** · January 20th, 2010, 01:01 PM

Make sure that you have the correct Java plugin installed (probably is), and also make sure that the jar file is in the same directory as your html file.

You could also try removing the main\ from the code parameter:

HTML Code:

<applet code="UI.class" archive="test.jar" width="500" height="300">
you need to have java installed to use this applet  
</APPLET>

**wolfgar** · January 21st, 2010, 01:57 AM

its in the same directory ( just sitting next to each other on my desktop)
and i should have the plugins , cause i've ran other applets b4
the dust game for example

**Json** · January 21st, 2010, 03:10 AM

Have you had a look here?

NullPointerException at FindAppletJDKLevel(unknown source) - Java Forums

// Json

**wolfgar** · January 21st, 2010, 06:24 AM

i just tried the java control panel thing and my next gen plugin is checked ><

i also looked through the rest of the page but that didnt help either ><

i just uploaded it so it would be easier for ppl to help .

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