Java Build path and Mac OS X Mountain Lion

After my update from Snow Leopard to Mountain Lion, my Eclipse environment build path got srewed up. My project folder icons showed a red exclamation mark which hinted me.
Have to look into it a bit further (by checking the Java for Developers packages), but I did this as a quick workaround:

1. In Eclipse, go to Preferences
2. At Installed JREs, add a JRE of type MacOS X VM
3. For the JRE Home use location: /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home

Reference:

• http://stackoverflow.com/questions/6614380/jdk-on-osx-10-7-lion
• http://forum.springsource.org/showthread.php?119513-Build-Bath-Issue-after-I-updated-to-MAC-OSX-Lion
• http://maclord.ozarweb.com/mevzu/install-java-on-mac-lion/