How to rectify "Bad version number in .class file" exception in Eclipse

How to rectify "Bad version number in .class file" exception in Eclipse

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Bad version number in .class file org.apache.jasper.servlet.JspServlet.service(JspServlet.java:274) javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.13 logs.

Apache Tomcat/6.0.13

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