Help in understanding creation of a jar file

Hi,
Could anyone explain what this (in), (out), and (deflated ) and (stored) means wrt the creation of a jar
For Ex:
adding: com/(in = 0) (out= 0)(stored 0%)
adding: com/test/(in = 0) (out= 0)(stored 0%)
adding: com/test/teststubs/(in = 0) (out= 0)(stored 0%)
adding: com/test/teststubs/TestLoader.class(in = 8029) (out= 4248)(deflated 47%)
TIA

I believe it's all about compression. "in" and "out" are the bytes added before and after compression. "deflated" is the compression method, and the percentage is the amount of compression achieved.
The first three things added in your example are directories, so they weren't added directly; rather the ZIP mechanism for expressing file hierarchies was used (as opposed to actually adding the directory file from the disk).

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