Unsupported major.minor version 51.0 error after moving from IntelliJ IDEA JBoss to MyEclipse Tomcat

java spring tomcat myeclipse
user2428795 picture user2428795 · Jul 24, 2013 · Viewed 10k times · Source

I am getting a Unsupported major.minor version 51.0 error after moving from IntelliJ IDEA JBoss to MyEclipse Tomcat.

Everything was working great under IntelliJ IDEA and JBoss and now we are moving to MyEclipse and Tomcat 6..

I am getting:

Unsupported major.minor version 51.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141

can someone please tell me how to fix this issue

Answer

StuPointerException picture StuPointerException · Jul 24, 2013

This happens when you compile the code in a higher version of the JDK than you are using at runtime.

You can set the compiler version here:

Project -> Properties -> Java Compiler

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