Welcome to the Java Programming Forums

The professional, friendly Java community. 21,500 members and growing!

The Java Programming Forums are a community of Java programmers from all around the World. Our members have a wide range of skills and they all have one thing in common: A passion to learn and code Java. We invite beginner Java programmers right through to Java professionals to post here and share your knowledge. Become a part of the community, help others, expand your knowledge of Java and enjoy talking with like minded people. Registration is quick and best of all free. We look forward to meeting you.


Members have full access to the forums. Advertisements are removed for registered users.

Results 1 to 2 of 2

Thread: Run time error

  1. #1
    Junior Member
    Join Date
    Feb 2013
    Thanked 0 Times in 0 Posts

    Default Run time error

    How can Solve it ????!!!

    java.lang.UnsupportedClassVersionError: JavaApplication18 : 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(Secure ClassLoader.java:141)
    at java.net.URLClassLoader.defineClass(URLClassLoader .java:283)
    at java.net.URLClassLoader.access$000(URLClassLoader. java:58)
    at java.net.URLClassLoader$1.run(URLClassLoader.java: 197)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.j ava:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:3 06)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launche r.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:2 47)
    Exception in thread "main"

  2. #2
    Administrator copeg's Avatar
    Join Date
    Oct 2009
    Thanked 833 Times in 772 Posts
    Blog Entries

    Default Re: Run time error

    Please don't hijack someone else's post on a completely unrelated subject. I have moved your post to its own thread.

    Your compiler and runtime versions of java are not the same - for instance you've compiled code on a later version of JDK and trying to run on an earlier version of the JRE. You can update your JRE, compile with an older JDK, or set compiler options for the code to run on earlier JRE's. The latter two are under the assumption the code does not use features of the later version of java.

Similar Threads

  1. Run Time Error!!!
    By RSelvan in forum What's Wrong With My Code?
    Replies: 3
    Last Post: December 20th, 2012, 07:40 AM
  2. run time error
    By nayeemohamed in forum What's Wrong With My Code?
    Replies: 3
    Last Post: August 6th, 2012, 04:33 PM
  3. Run Time Error
    By Tanmaysinha in forum What's Wrong With My Code?
    Replies: 22
    Last Post: March 8th, 2012, 11:29 AM
  4. Run Time Error.
    By seymour001 in forum What's Wrong With My Code?
    Replies: 4
    Last Post: August 10th, 2011, 12:10 PM
  5. [SOLVED] Run time error
    By moodycrab3 in forum What's Wrong With My Code?
    Replies: 1
    Last Post: February 7th, 2011, 11:05 AM