|
Préférences
Moteurs de recherche
|
||||||||||||
JavaTM 2 Platform Std. Ed. v1.6.0
java.util
|
Method Summary | |
---|---|
boolean |
equals(Object o)
Compares the specified object with this entry for equality. |
K |
getKey()
Returns the key corresponding to this entry. |
V |
getValue()
Returns the value corresponding to this entry. |
int |
hashCode()
Returns the hash code value for this map entry. |
V |
setValue(V value)
Replaces the value corresponding to this entry with the specified value (optional operation). |
Method Detail |
---|
K getKey()
IllegalStateException
- implementations may, but are not
required to, throw this exception if the entry has been
removed from the backing map.V getValue()
IllegalStateException
- implementations may, but are not
required to, throw this exception if the entry has been
removed from the backing map.V setValue(V value)
value
- new value to be stored in this entry
UnsupportedOperationException
- if the put operation
is not supported by the backing map
ClassCastException
- if the class of the specified value
prevents it from being stored in the backing map
NullPointerException
- if the backing map does not permit
null values, and the specified value is null
IllegalArgumentException
- if some property of this value
prevents it from being stored in the backing map
IllegalStateException
- implementations may, but are not
required to, throw this exception if the entry has been
removed from the backing map.boolean equals(Object o)
(e1.getKey()==null ? e2.getKey()==null : e1.getKey().equals(e2.getKey())) && (e1.getValue()==null ? e2.getValue()==null : e1.getValue().equals(e2.getValue()))This ensures that the equals method works properly across different implementations of the Map.Entry interface.
o
- object to be compared for equality with this map entry
Object.hashCode()
,
Hashtable
int hashCode()
(e.getKey()==null ? 0 : e.getKey().hashCode()) ^ (e.getValue()==null ? 0 : e.getValue().hashCode())This ensures that e1.equals(e2) implies that e1.hashCode()==e2.hashCode() for any two Entries e1 and e2, as required by the general contract of Object.hashCode.
Object.hashCode()
,
Object.equals(Object)
,
equals(Object)