Question: What would be the easiest way to view classes, methods, properties, etc. inside a jar file?
I'm looking for something equivalent to the very useful  *Lutz Roeder .NET Reflector*  - for Java

Answer: 
**[Use WinRar](http://www.rarlab.com)**. It will open the folder structure for you in intact manner. Also allows in-archive editing, while preserving paths.

Afterall, a JAR file is a ZIP archive only.
On Mac there's [Jarzilla](http://code.google.com/p/jarzilla/)