How to attach Java src jar’s to Eclipse
Go to:
cd /System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Home
Find the src.jar there:
find /Library/Java -name ‘src.jar’
And link whatever you will find in current directory
$ sudo ln -s /Library/Java/JavaVirtualMachines/1.6.0_51-b11-457.jdk/Contents/Home/src.jar .