java.lang
Class NullPointerException

java.lang.Object
  extended byjava.lang.Throwable
      extended byjava.lang.Exception
          extended byjava.lang.RuntimeException
              extended byjava.lang.NullPointerException
All Implemented Interfaces:
Serializable

public class NullPointerException
extends RuntimeException

Thrown when an application attempts to use null in a case where an object is required. These include:

Applications should throw instances of this class to indicate other illegal uses of the null object.

Since:
JDK1.0
Author:
unascribed
See Also:
Serialized Form

Field Summary
 
Fields inherited from class java.lang.RuntimeException
serialVersionUID
 
Fields inherited from class java.lang.Throwable
 
Constructor Summary
NullPointerException()
          Constructs a NullPointerException with no detail message.
NullPointerException(String s)
          Constructs a NullPointerException with the specified detail message.
 
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()
Constructs a NullPointerException with no detail message.


NullPointerException

public NullPointerException(String s)
Constructs a NullPointerException with the specified detail message.

Parameters:
s - the detail message.