download the beta version of NetBeans 7.0. It supports JDK 7.0 and should work with the latest build from the OpenJDK website. This means you can play with some of the Project Coin changes like Strings in switch statements.In case you fancy having a try of the newest version of NetBeans you can now
For more information on what's new in NetBeans 7.0 have a look at the New and Noteworthy page.
The final release of NetBeans 7.0 is scheduled for March 2011