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java.lang.Object org.apache.commons.lang.ObjectUtils.Null
public static class 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.
Method Summary |
---|
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
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