Translate java source file

Dear Friends,
Does anybody know how to translate java sources file and get all the info from it.
Like i want to write a parser and want to extract its details and store in datastructures.
Any similar examples present or any suggessions please inform.
Thanks in advance.

there is a tool called javacc which generates parsing code. You can also google for "javacc grammar repository" to find a java grammer you can pick up and start using

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