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java.lang
Class NullPointerException

java.lang.Object
  extended by java.lang.Throwable
      extended by java.lang.Exception
          extended by java.lang.RuntimeException
              extended by 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.

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