public static interface Map.Entry<K,V>
Map.entrySet()
Modifier and Type | Method and Description |
---|---|
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).
|
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.
equals
in class Object
o
- object to be compared for equality with this map entryObject.hashCode()
,
HashMap
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.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.
hashCode
in class Object
Object.hashCode()
,
Object.equals(Object)
,
equals(Object)
V setValue(V value)
value
- new value to be stored in this entryUnsupportedOperationException
- if the put operation
is not supported by the backing mapClassCastException
- if the class of the specified value
prevents it from being stored in the backing mapNullPointerException
- if the backing map does not permit
null values, and the specified value is nullIllegalArgumentException
- if some property of this value
prevents it from being stored in the backing mapIllegalStateException
- implementations may, but are not
required to, throw this exception if the entry has been
removed from the backing map.Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. Use of this specification is subject to license terms.