New to Java

Duplicate method name&signature in class file...

Class ClassFormatError: Thrown when the Java Virtual Machine attempts to read a class file and determines that the file is malformed or otherwise cannot be interpreted as a class file.

I get this error when compiling. Can someone break this down for me more clearly of what might be wrong. What might I need to do to fix. DO you need to see code to diagnose the problem?

Thanks!