Source for Java libraries on OSX?

Does Apple provide some equivalent to the src.zip that comes with Sun's JDKs? Something that contains the source for the standard libraries (e.g. really fundamental stuff like java.lang.String), as implemented in Apple's Java? I'm new to the Mac world, but so far I haven't found anything like that in Apple's install, or on their web site. I could grab the src.zip from the equivalent Sun JDK and I imagine it would be pretty close if not identical for most classes (excluding the com.apple stuff of course, maybe more). Anyone have any good suggestions? Thanks.

/System/Library/Frameworks/JavaVM.framework/Versions/1.4.2/Home/src.jar

Thanks for the response, Bear - unfortunately I don't seem to have that file. The directory is there, but no src.jar.

I'm actually more interested in 1.5.0 than 1.4.2, but the problem is the same.

On Windows I recall there was an "include source" option at some point in the install. I don't recall seeing such an option when I installed 1.5.0 on OSX - did I miss something?
[ September 14, 2005: Message edited by: Jim Yingst ]

OK, since Bear gave me the exact file name for what I wanted I was able to do a more accurate Google search than I'd previously been able to. This led me to http://connect.apple.com where I found the 1.5 documentation download I needed. Thanks, Bear!
[ September 14, 2005: Message edited by: Jim Yingst ]

Too cool!