Solved

Java Client Applet - Incompatible Magic Value

Posted on 2010-08-18
4
629 Views
Last Modified: 2012-08-13
Sometimes I ask my friends to try out my applet and some get in and it works FINE for them... and for others... they get this error ...

java.lang.ClassFormatError: Incompatible magic value 1008813135 in class file tileGen
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClassCond(Unknown Source)
	at java.lang.ClassLoader.defineClass(Unknown Source)
	at java.security.SecureClassLoader.defineClass(Unknown Source)
	at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
*	at java.lang.ClassLoader.loadClass(Unknown Source)
	at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
	at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
	at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)

Open in new window


Maybe it's because I compiled with the latest version of java and the friends are used an outdated java? maybe? What do you think?

thanks.
0
Comment
Question by:UrbanTwitch
  • 2
  • 2
4 Comments
 
LVL 92

Accepted Solution

by:
objects earned 500 total points
ID: 33471491
yes that error is caused by comiling for a later version of java than it is being run with
you can use the javac switchs -target -source to control what version class file is produced
0
 
LVL 5

Author Comment

by:UrbanTwitch
ID: 33471497
What would be a good version to compile at? 1.5?
0
 
LVL 92

Expert Comment

by:objects
ID: 33471506
actually that value suggests its a corrupt class file that is being used.
might be worth getting them to clear there java cache and reload the applet

> What would be a good version to compile at? 1.5?

1.5 is a good choice
to do that you need to make sure you're not using any 1.6 features.
0
 
LVL 5

Author Comment

by:UrbanTwitch
ID: 33471549
Well then, my tileGen probably is because my friend who had the error got another error... so yeah.. either update or don't play. thanks.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Non-recursive backtracking, using a stack 1 102
Java / Linux and Regular Expressions 11 71
maven project error 5 48
diffSum example 4 26
For customizing the look of your lightweight component and making it look opaque like it was made of plastic.  This tip assumes your component to be of rectangular shape and completely opaque.   (CODE)
By the end of 1980s, object oriented programming using languages like C++, Simula69 and ObjectPascal gained momentum. It looked like programmers finally found the perfect language. C++ successfully combined the object oriented principles of Simula w…
Viewers will learn about if statements in Java and their use The if statement: The condition required to create an if statement: Variations of if statements: An example using if statements:
Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …

920 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now