java.lang
Class NullPointerException

java.lang.Object
  java.lang.Throwable
      java.lang.Exception
          java.lang.RuntimeException
              java.lang.NullPointerException

All Implemented Interfaces:

Serializable

public class NullPointerException
extends RuntimeException

NullPointerException is a runtime exception that is thrown by the virtual machine on an attempt to dereference the value null.

Since:

1.0

See Also:

Serialized Form

Constructor Summary

NullPointerException()
Constructor for a NullPointerException with no detail message.

NullPointerException(String s)
Constructor for a NullPointerException with given detail message.

Method Summary

Methods inherited from class java.lang.Throwable

fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

NullPointerException

public NullPointerException()

Constructor for a NullPointerException with no detail message.

NullPointerException

public NullPointerException(String s)

Constructor for a NullPointerException with given detail message.

ensures

    (s != null IMPLIES getMessage().equals(s));
 

Parameters:

s - the detail message.