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UnsupportedClassVersionError

Mg Oo
Greenhorn

Joined: Nov 28, 2004
Posts: 22
Dear Java masters

How to escape such error? I face when I run files in other computers (eg.friends', lab's)
Ulf Dittmer
Marshal

Joined: Mar 22, 2005
Posts: 39547
    
  27
This error occurs if the classes were compiled with a JDK that is newer than the one you're using to run them. Version 49.0 is the one generated by Java 1.5, so you're probably trying to run it with a Java 1.4 JVM.

Try compiling your code with the "-source 1.4 -target 1.4" options. This will only work if you use no Java 5-specific code, of course. If you do, upgrade the JVM on the other machine to Java 5.


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