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How to get java file i.e source code from class file i.e from compiled file?
You have to use a disassembler.
Java Decompiler is a good choice.
Also Java Decompiler has a plug-in for Eclipse.
You can use javap command to get the overall structure of the file.
On the side note: Best way to disable anyone from getting the source from your compiled code is to use obfuscation.
Yes you cannot do anything like reverse conversion.
What you can do is modify the bytecode at runtime. That s allowed in Java...
Check for java.lang.instrumentation package. That will help you to achieve your goal to some extent...
I just published a stand-alone Java Decompiler GUI (based on Jad) which you can get from Util Java Decompiler (JAD based) v1.0
This is a Windows based .NET 4.0 application, which supports the drag n drop of *.jar files.
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