plz tell me

[satwant singh]

ihve made a class "welcome" it was running on jdk1.3 but last night i installed jdk1.6.0 after unistalling jd1.4 then following error came at run time


Exception in thread "main" java.lang.UnsupportedClassVersionError: welcome
(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

then again i install jdk1.4 and set the path
of c:\programfiles\java\jdk1.4\bin;c:\programfiles\java\jdk1.6.0\bin;
then the code run successfully

why so

[Bear Bibeault]

Please take the time to choose the correct forum for your posts. This forum is for questions on JSP.

For more information, please read this.

This post has been moved to a more appropriate forum.

[Aum Tao]

It's not clear from your question whether you had JDK 1.3 of JDK 1.4 initially. This error is usually indicative of the fact that you have more than one java versions involved. You might want to check it with

 java -version    

And, remove any additional JDKs.

[Campbell Ritchie]

And please don't write p-l-z: read this FAQ.