Package org.jboss.util
Class Null
- java.lang.Object
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- org.jboss.util.Null
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- 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, andVALUE
would idicate that the value has been set to null (or something to that effect).- Version:
- $Revision$
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description private static long
serialVersionUID
The serialVersionUIDstatic Null
VALUE
The primary instance of Null.
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Constructor Summary
Constructors Modifier Constructor Description private
Null()
Do not allow public construction.
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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.
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Field Detail
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serialVersionUID
private static final long serialVersionUID
The serialVersionUID- See Also:
- Constant Field Values
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VALUE
public static final Null VALUE
The primary instance of Null.
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Method Detail
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toString
public java.lang.String toString()
Return a string representation.- Overrides:
toString
in classjava.lang.Object
- Returns:
- Null
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hashCode
public int hashCode()
Returns zero.- Overrides:
hashCode
in classjava.lang.Object
- Returns:
- Zero.
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equals
public boolean equals(java.lang.Object obj)
Check if the given object is a Null instance or null.- Overrides:
equals
in classjava.lang.Object
- Parameters:
obj
- Object to test.- Returns:
- True if the given object is a Null instance or null.
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