title: Java, UnsupportedClassVersionError. How can I fix this
body: <p>I was doing my homework in eclipse and it reported no errors, not even warnings. When I tried to compile it from terminal I got following error. It runs and compiles just fine with eclipse. I take it it has something to do with java version? Anyway to fix it or try to bypass it?</p>
  
  <pre><code>vedran@vedran-debian:~/java/oop/Aufgabe6$ java Test 
  Exception in thread "main" java.lang.UnsupportedClassVersionError: Test : Unsupported major.minor version 51.0
      at java.lang.ClassLoader.defineClass1(Native Method)
      at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
      at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
      at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
      at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
      at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
  Could not find the main class: Test. Program will exit.
  </code></pre>
  
  <p>Java version: </p>
  
  <pre><code>java version "1.6.0_23" 
  OpenJDK Runtime Environment (IcedTea6 1.11pre) (6b23~pre11-1) 
  OpenJDK 64-Bit Server VM (build 20.0-b11, mixed mode) 
  </code></pre>
  
  <p>EDIT:</p>
  
  <p>Thank you all for your explanations. It seems to be a java6/7 issue. I just compiled it with  1.6 and it worked like charm.</p>