Question : Is there a way to unjar and have java classes as it is in eclipse and add log statements to  it and jar it again

If yes how do we get java source from it and add couple of logs to it and jar it again

Answer : Is there a way to unjar and have java classes as it is in eclipse and add log statements to  it and jar it again

The unresolved errors can be done away with if you can get a hold of the libraries/classes being referred to in the jar code. After you decompile and get the source and add the libraries/classes and the log files you will have to recompile the files and build the jar for it to work correctly.