Class Null

  • All Implemented Interfaces:
    java.io.Serializable

    public final class Null
    extends java.lang.Object
    implements java.io.Serializable
    A class that represents null.

    VALUE is used to given an object variable a dual-mode nullified value, where null would indicate that the value is empty, and VALUE would idicate that the value has been set to null (or something to that effect).

    Version:
    $Revision$
    See Also:
    Serialized Form
    • Field Summary

      Fields 
      Modifier and Type Field Description
      private static long serialVersionUID
      The serialVersionUID
      static Null VALUE
      The primary instance of Null.
    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private Null()
      Do not allow public construction.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean equals​(java.lang.Object obj)
      Check if the given object is a Null instance or null.
      int hashCode()
      Returns zero.
      java.lang.String toString()
      Return a string representation.
      • Methods inherited from class java.lang.Object

        clone, finalize, getClass, notify, notifyAll, wait, wait, wait
    • Field Detail

      • serialVersionUID

        private static final long serialVersionUID
        The serialVersionUID
        See Also:
        Constant Field Values
      • VALUE

        public static final Null VALUE
        The primary instance of Null.
    • Constructor Detail

      • Null

        private Null()
        Do not allow public construction.
    • Method Detail

      • toString

        public java.lang.String toString()
        Return a string representation.
        Overrides:
        toString in class java.lang.Object
        Returns:
        Null
      • hashCode

        public int hashCode()
        Returns zero.
        Overrides:
        hashCode in class java.lang.Object
        Returns:
        Zero.
      • equals

        public boolean equals​(java.lang.Object obj)
        Check if the given object is a Null instance or null.
        Overrides:
        equals in class java.lang.Object
        Parameters:
        obj - Object to test.
        Returns:
        True if the given object is a Null instance or null.