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Exception in thread "main" [message #796517]

Sat, 11 February 2012 23:42

Eclipse User

i have newly installed eclipse jee on fedora,
i am trying to run simple Hello World program and got following error,

Exception in thread "main" java.lang.UnsupportedClassVersionError: HelloWorld : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:638)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:143)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:281)
at java.net.URLClassLoader.access$000(URLClassLoader.java:74)
at java.net.URLClassLoader$1.run(URLClassLoader.java:216)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:209)
at java.lang.ClassLoader.loadClass(ClassLoader.java:324)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:269)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:337)
Error: Could not find the main class.
Error: A JNI error has occurred, please check your installation and try again

what is wrong here?
please help me to solve this problem.

Re: Exception in thread "main" [message #796630 is a reply to message #796517]

Sun, 12 February 2012 04:13

Eclipse User

The JDK version that runs the program is older than the JDK version used to compile the code. You should make both the same version, or the JDK that runs the program is always the latest.

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