This bug was originally marked as duplicate of bug 153005, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.

Build: NetBeans IDE 7.0.1 (Build 201107282000)
VM: Java HotSpot(TM) Client VM, 1.6.0-b105, Java(TM) SE Runtime Environment, 1.6.0-b105
OS: Windows Vista

User Comments:
GUEST: Everytime i try to bind my swing components to data or another property I encounter this exception

GUEST: Openning binding contents of a table JTable

GUEST: trying to bind a list to a jtable
toplink database oracle 9i

GUEST: Nothing, i only load a "View file" which i dont touch it months ago.

GUEST: I was trying to change to modify elements binding of a JList (JList->binding->elements:: double click)

once I set this property, I cannot modify it anymore.

keep up the good work :)
Paolo




Stacktrace: 
java.lang.UnsupportedClassVersionError: logastore/Stockstable : Unsupported major.minor version 51.0
   at java.lang.ClassLoader.defineClass1(ClassLoader.java:0)
   at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
   at java.lang.ClassLoader.defineClass(ClassLoader.java:465)
   at org.netbeans.modules.form.project.ProjectClassLoader.findClass(ProjectClassLoader.java:162)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:251)