I have to debug some classes, which are not provided with source code in NetBeans.
I have to choose from these options:
1. Switch to Eclipse and use JD-Eclipse. Many people indicates that they use it without problems.
2. Decompile the sources and add them to IDE. In this case we have to an another problem - line numbers. From Java bytecode, IDE knows the lines, where the operations are placed in source code. If lines mismatch, the debugger jumps to wrong numbers - fail.