For those who prefer Aladdin Stuffit on Windows, here some tips:
The following registry key will associate .jar files to that you can expand them with ease. A nice trick to have.
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\.jar]
"PerceivedType"="compressed"
@="StuffIt.Zip.Archive.View"
"CONTENT TYPE"="application/x-stuffit"
[HKEY_CLASSES_ROOT\.jar\CompressedFolder
[HKEY_CLASSES_ROOT\.jar\CompressedFolder\ShellNew]
"Data"=hex:50,4b,05,06,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00
[HKEY_CLASSES_ROOT\.jar\OpenWithProgids]
"CompressedFolder"=""
[HKEY_CLASSES_ROOT\.jar\PersistentHandler]
@="{098f2470-bae0-11cd-b579-08002b30bfeb}
Provided at your own risk.
Save the contents into a text file with the extension .reg. Then open it.
You can also go into the preferences and save without compression. Then just right click, and zip.