Bad version number in .class file

[K Sathya Narayanan]

hi
i am using Tomcat 5.5 web server, eclipse version 3.1.2(Lombaz)

i have
1) Jre1.5.0_06 and
2) Jre1.6.0_03

for Jre1.6.0_03 i have set the classpath , path and java_Home

i am accession a java file from jsp .
it displays the "java.lang.UnsupportedClassVersionError: Bad version number in .class file"

can you tell me what i should do now
can i uninstall Jre1.6.0_03
is tomcat 5.5 not compitable with Jre1.6.0_03

[sudhir nim]

"java.lang.UnsupportedClassVersionError" is thrown when the class has been compiled using different version of java (i.e when you try to use jdk-5 compiled class in jdk-4).

change the jre in eclipse to 1.6

[Ulf Dittmer]

Tomcat is compatible with both JDK versions.

It sounds as if you are compiling with JDK 1.6, and running the code with JDK 1.5. So changing the JRE in Eclipse (as suggested above) won't solve the problem (it's set to 1.6 already). What you need to do is to compile the code and run it with the same JRE/JDK version. So either switch Eclipse to JDK 1.5, or run Tomcat with JDK 1.6.

[K Sathya Narayanan]

thanks a lot


i changed both eclipse and tomcat to 1.5 and recompiled all the class files
and it works correctly

[sudhir nim]

Either switch Eclipse to JDK 1.5, or run Tomcat with JDK 1.6

Thats wat I wanted to say, I thought that he is already running tomcat with 1.6.