Comment 3 for bug 1360100

Same problem here.
When trying to pen a project I get this exception:

java.lang.UnsupportedClassVersionError: javax/tools/JavaFileManager : Unsupported major.minor version 51.0
 at java.lang.ClassLoader.defineClass1(Native Method)
 at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
 at org.netbeans.JarClassLoader.doLoadClass(Unknown Source)
 at org.netbeans.ProxyClassLoader.selfLoadClass(Unknown Source)
 at org.netbeans.ProxyClassLoader.loadClass(Unknown Source)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
 at org.netbeans.modules.java.j2seproject.MainClassUpdater.addFileChangeListener(Unknown Source)
 at org.netbeans.modules.java.j2seproject.MainClassUpdater.<init>(Unknown Source)
 at org.netbeans.modules.java.j2seproject.J2SEProject$ProjectOpenedHookImpl.projectOpened(Unknown Source)
 at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectOpened(ProjectOpenedHook.java:84)
 at org.netbeans.spi.project.ui.support.UILookupMergerSupport$OpenHookImpl.projectOpened(UILookupMergerSupport.java:196)
 at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectOpened(ProjectOpenedHook.java:84)
[catch] at org.netbeans.modules.project.ui.OpenProjectList.notifyOpened(OpenProjectList.java:1130)
 at org.netbeans.modules.project.ui.OpenProjectList.doOpenProject(OpenProjectList.java:1213)
 at org.netbeans.modules.project.ui.OpenProjectList.doOpen(OpenProjectList.java:700)
 at org.netbeans.modules.project.ui.OpenProjectList.access$2000(OpenProjectList.java:136)
 at org.netbeans.modules.project.ui.OpenProjectList$4.run(OpenProjectList.java:585)
 at org.openide.util.RequestProcessor$Task.run(Unknown Source)
 at org.openide.util.RequestProcessor$Processor.run(Unknown Source)