Runnable JAR file error: Unsupported major.minor version 51.0

Question

I made an application in Java (version 7) with Eclipse (Indigo) when I exported my application interface on a Runnable JAR file on my computer and tried it worked fine, then I tried on another computer and I get this problem

Exception in thread "main" java.lang.UnsupportedClassVersionError: cliente/Princ
ipal : Unsupported major.minor version 51.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(Unknown Source)
    at java.lang.ClassLoader.defineClass(Unknown Source)
    at java.security.SecureClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.access$000(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoa
der.java:56)

I saw other post that this can be because the other computer have an older version of Java than mine, can somebody confirm this please?.

score 2 · Accepted Answer · edited May 23 '17 at 11:50

2

Yes, that is the error when you try to run Java bytecode with an older version that the version you build it with.

You will find more information in this question.

edited May 23 '17 at 11:50

Community

1
1

answered Jun 14 '13 at 20:06

LaurentG

11,128
9
51
66

Thanks!, I already checked in a computer with the same version as mine and it works. – Bender Jun 17 '13 at 09:25

Runnable JAR file error: Unsupported major.minor version 51.0

1 Answers1