Null

java.lang.Object
- org.jboss.util.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.