UnsupportedOperationException and OperationNotSupportedException

For some unimplemented methods, I want to throw some exception instead of leaving it blank. I know there is already such a class in Java but don't know its exact name. So I typed "Operation" and then Ctrl-Space to let NetBeans to complete it. But only javax.naming.OperationNotSupportedException showed up, which is not what I want. After some search, it turns out the right class is java.lang.UnsupportedOperationException. Description from its javadoc:

java.lang.Object
 java.lang.Throwable
     java.lang.Exception
         java.lang.RuntimeException
             java.lang.UnsupportedOperationException 

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

HeadlessException, ReadOnlyBufferException

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public class UnsupportedOperationException
extends RuntimeException

Thrown to indicate that the requested operation is not supported.

This class is a member of the Java Collections Framework.

Since:

1.2