Package org.apache.commons.lang3
Class ObjectUtils.Null
java.lang.Object
org.apache.commons.lang3.ObjectUtils.Null
- All Implemented Interfaces:
Serializable
- Enclosing class:
- ObjectUtils
Class used as a null placeholder where
null
has another meaning.
For example, in a HashMap the
HashMap.get(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.
- See Also:
-
Method Summary