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

All Implemented Interfaces:
    Serializable

• Calling the instance method of a null object.
• Accessing or modifying the field of a null object.
• Taking the length of null as if it were an array.
• Accessing or modifying the slots of null as if it were an array.
• Throwing null as if it were a Throwable value.

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

author: unascribed -

since: JDK1.0 -

 public NullPointerException() 
{
        super();
}

 public NullPointerException(String s) 
{
        super(s);
}