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problem of UnsupportedClassVersionError

Shyam Sunder

Joined: Dec 23, 2006
Posts: 24
hi Friends,

i have downloaded a sample project form roseindia.
and copy pasted the whole folder in webapps.
but when i tried to run application. i am getting this error which i have taken from tomcat logs

java.lang.UnsupportedClassVersionError: roseindia/dao/SpringHibernateDAOImpl (Unsupported major.minor version 49.0)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:539)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1634)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:860)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1307)
Merrill Higginson
Ranch Hand

Joined: Feb 15, 2005
Posts: 4864
This is an exception that occurs when classes are compiled with a higher version of the Java SDK (e.g. 1.6) and then you attempt to run them on a lower version (e.g. 1.4). The solution is to recompile the classes with the same Java SDK you will be using at runtime.
[ July 19, 2007: Message edited by: Merrill Higginson ]

Consultant, Sima Solutions
Ram Chhabra

Joined: Jun 23, 2007
Posts: 23
Hi Shyam

This error comes due to difference in JDk version.

I am not sure but this error comes like if you try to run files which are compiled on jdk 1.5 to some lower version like jdk 1.4. or this may be vice - versa .

So please check your jdk version and after changing to that it will surely work.

I am sorry that i am confused about that, so please forgive me for that.
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subject: problem of UnsupportedClassVersionError
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