My Mac currently is running Snow Leopard (10.6.8), and I would like to develop with Java 7. I downloaded the Java 7 OS X installer from Oracle\'s website, started to run it.
What you want is not impossible but for sure NOT recommended but... once you are sure that this is what you want, here is an easy way to install Java (or any software for OS related matters): - navigate to you MainHD/System/Library/CoreServices/SystemVersion.plist - backup this file !! - open it in Text editor and alter the product version:
ProductUserVisibleVersion
10.6.8
ProductVersion
10.6.8
according to you needs.
Warning: A samurai take 7 breaths before taken any decision.