Junk values when decompiling the class file

Hi All,
When i decompiling the class file , i am getting junk values i.e <file>.class$java.lang.string and _mtclass$("java.lang.string").
I am using JAD for decompilation .
Can any body help.. how remove the junk data

ya and better part being that its an issue with the tool used for decompilation. Nothing specific to OAF here. Any class file will behave in the same way to this tool.
--Shiv                                                                                                                                                                                                                                                                                                                                                                   

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