Identical Java sources compile to binary differing classes

Question

Can anyone explain how identical Java sources can end up compiling to binary differing class files?

The question arises from the following situation:

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Answer 1

Different versions of Java can add different meta data which is often ignored by a decompiler.

I suggest you try using javap -c -v for more of the details in a file. If this doesn't help you can use the ASMifierClassVisitor which looks at every byte.