If you install JDK 7 after Netbeans you can follow the instructions below to configure Netbeans 7.0 Beta 2 with JDK 7. Configuring NetBeans to work with JDK 7 ...

Version 7.4 of the IDE extends the HTML5 support provided in the previous release to Java EE and PHP applications, and becomes the first IDE to provide support for JDK 8 developer preview builds.