Exception in thread "main" java.lang.UnsupportedClassVersionError: a (Unsupported major.minor version 51.0) -


possible duplicate:
unsupported major .minor version 51.0

i installed jdk7, simple hello word program gets compile when run got following exception.

exception in thread "main" java.lang.unsupportedclassversionerror: (unsupported major.minor version 51.0)     @ java.lang.classloader.defineclass0(native method)     @ java.lang.classloader.defineclass(unknown source)     @ java.security.secureclassloader.defineclass(unknown source)     @ java.net.urlclassloader.defineclass(unknown source)     @ java.net.urlclassloader.access$100(unknown source)     @ java.net.urlclassloader$1.run(unknown source)     @ java.security.accesscontroller.doprivileged(native method)     @ java.net.urlclassloader.findclass(unknown source)     @ java.lang.classloader.loadclass(unknown source)     @ sun.misc.launcher$appclassloader.loadclass(unknown source)     @ java.lang.classloader.loadclass(unknown source)     @ java.lang.classloader.loadclassinternal(unknown source)

i checked java -version on command prompt, shows java version 1.4.2_03 when tried install new java version java.com says i'm having recommended java 7 version.

copy contents of path settings notepad , check if location 1.4.2 comes before of 7. if so, remove path 1.4.2 in path setting , save it.

after saving , applying "environment variables" close , reopen cmd line. in xp path no reflected in running programs.


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