Netbeans 7.3's support? It works fine on Java 6, though it will only grudgingly use it if 7 is installed. If you're on MacOS (assuming that from the retina screen), then, in /Applications/NetBeans/NetBeans 7.3.app/Contents/Resources/NetBeans/etc/netbeans.conf

add the line

netbeans_jdkhome="/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home"

(Yes, the configuration lives _inside_ the application bundle. Lovely.)