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Bookmark "What is "java.lang.ClassFormatError: bad magic number"?" Watch "What is "java.lang.ClassFormatError: bad magic number"?" New topic
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What is "java.lang.ClassFormatError: bad magic number"?

Gary Bryan
Greenhorn

Joined: Sep 16, 2000
Posts: 9
I have written an applet, and when I try to load it on the Internet, i get an error like the above. It works fine locally, it's just on the Internet it doesn't work. The applet fails to load because of this.
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Gary Bryan


--<BR>Gary Bryan<BR>
Noah Carroll
Ranch Hand

Joined: Sep 20, 2000
Posts: 96
I believe you get that error when the class file cannot be found. Make sure you have the correct path to it and remember that capitalization does count for the applet name.
[ March 31, 2008: Message edited by: Noah Carroll ]
Brooks Duncan
Greenhorn

Joined: Oct 16, 2000
Posts: 5
I have gotten that error when I have somehow gotten a corrupt .class file. Usually it happens when I forget to put the jar name when I try to jar something, and it ends up screwing up all the class files in the folder.
Try recompiling your .java file(s) and see if that helps.
-B
 
It is sorta covered in the JavaRanch Style Guide.
 
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