UnsupportedClassVersionError --

[Aditya Kanitkar]

Hi, guys....

Does anybody have more idea about this error...??

Exception in thread "main" java.lang.UnsupportedClassVersionError: MyClass (Unsupported major.minor version 49.0)
        at java.lang.ClassLoader.defineClass0(Native Method)
        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$100(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClassInternal(Unknown Source)

Last evening, it was working fine...

Thanks,

Aditya Kanitkar

[Campbell Ritchie]

It's very common. I think 49.0 means Java5. It means you compiled your code with an newer compiler than the JVM you are running it with. Get a newer JVM. Get a Java6 JDK.

If 49.0 is Java5, you must have compiled it with a Java6 compiler and are running the code on a Java5 JVM.

[Rob Spoor]

Campbell Ritchie wrote:If 49.0 is Java5, you must have compiled it with a Java6 compiler and are running the code on a Java5 JVM.

I think you mean that the compiler must have been Java 5 and the JVM is Java 1.4. The class version in the .class file is 49.0 - Java 5.

[Aditya Kanitkar]

Rob Prime wrote:

Campbell Ritchie wrote:If 49.0 is Java5, you must have compiled it with a Java6 compiler and are running the code on a Java5 JVM.

I think you mean that the compiler must have been Java 5 and the JVM is Java 1.4. The class version in the .class file is 49.0 - Java 5.

Actually, Oracle Client was installed on my machine, that time oracle jvm 1.4 was set in the path. This was the root of the problem.
So now i have removed that path of oracle jvm 1.4 from PATH environ var, And the error has gone...


Thanks,

Aditya Kanitkar

[David Newton]

Ah yes, Oracle has a tendency to do this.

[Campbell Ritchie]

Rob Prime wrote: . . . the compiler must have been Java 5 and the JVM is Java 1.4. . . .

Yes, you are right there.