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java.lang.Object | +--org.apache.commons.lang.ObjectUtils.Null
Class used as a null placeholder where null
has another meaning.
For example, in a HashMap the
HashMap.get(java.lang.Object) method returns
null if the Map contains
null or if there is no matching key. The
Null placeholder can be used to distinguish between
these two cases.
Another example is Hashtable, where null
cannot be stored.
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
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