Newbie error - UnsupportedClassVersionError:  How to fix ?

Hi,
I am getting started with Spring Frame work and encountering this error -
java.lang.UnsupportedClassVersionError: org/springframework/web/servlet/DispatcherServlet (Unsupported major.minor version 47.0)
How can I resolve it.?
Help would be much appreciated.
Thanks
Ru

Thank you !!
I realized I had an active JDK 1.2. Now getting it upgraded to 1.4
Thanks again for the replies.
Ru

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