java.lang.UnsupportedClassVersionError

Hi All,
i have recently installed jdk-6-windows-i586.exe. I also set Path and classpath (environmental variables). I could able to compile the hello.java file but when i am trying to run using the command

java hello

i am getting the below error

Exception in thread "main" java.lang.UnsupportedClassVersionError: hello (Unsupported major.minor version 50.0)
at java.lang.classloader.defineclass0(Native Methos)
at java.lang.classloader.defineclass(Unknown Source)
at java.security.secureclassloader.defineclass(unknow n source)
at java.new.URLClassLoader.defineclass(Unknown source)
at .....



i have run the command

C:\>java -version
java version "1.4.2_03"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_03-b02)
Java HotSpot(TM) Client VM (build 1.4.2_03-b02, mixed mode)

C:\>javac -version
javac 1.6.0

I have checked the forum i found the same. Compiled the source code with higher version and trying to run the .class file with lower version. Then i tried by uninstalling jdk and re-install it. But i am facing the same problem.

My question is how to know/find which path command prompt is point for java.exe. So that i could uninstall and then re-install it again.

or if there are any other solution please help me.

Thanks,

check if there are other versions of Java on your system path. If so, get rid of the old versions in the path.

Fubarable,

Yesterday i tried to find out but couldn't. can you help me by telling how to find other versions of java. i checked "Add remove programs" and removed everything with java and then re-installed jdk but it didn't help. also checked plugins but no use. can you please help me.
Thanks,

I may be wrong here, but the issue may not be so much which versions of Java are on your machine, but what the System Path looks at first. Are you using Windows? Do you know how to inspect and edit the System Path? If so, have a look and see if it looks for Java version 4 before it looks for 6. If so, remove version 4 from the Path.

Hi

i found something in path

Code:

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G:\oracle\product\10.1.0\Db_2\jre\1.4.2\bin

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I did not put this in PATH variable and i think it got in there automatically when i installed oracle. But if i remove/delete this, will it not affect the oracle setup.

and yes i am using Windows.

Code:

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G:\oracle\product\10.1.0\Db_2\bin;G:\oracle\product\10.1.0\Db_2\jre\1.4.2\bin\client;G:\oracle\product\10.1.0\Db_2\jre\1.4.2\bin;G:\app\Babloo\product\11.1.0\db_1\bin;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;

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can anyone help me.

Have you tried removing the path to the oracle jre to see what happens to both your program and oracle? I mean you can't ruin anything by just doing a little experimenting on your own here, can you?

Quote:

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Originally Posted by gskn4u

can anyone help me.

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You've already been told all you need really. You can't compile a program with 1.6 (for 1.6) and run it with 1.4.
Your javac version on your path is 1.6 and your java version on your path is 1.4.
If you want to keep both on the path like that then you'll need to explicitly state which version you want to use for every command you run.

Thank you Fubarable and r035198x. Experimenting worked for me. i did not remove the oracle path but i have changed the order. i have put jdk path first. it did work for me.

Thank you.

I knew you could do it. Congrats and you're welcome.