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Préférences
Moteurs de recherche
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JavaTM 2 Platform Std. Ed. v1.4.2
java.util
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Method Summary | |
boolean |
equals(Object o)
Compares the specified object with this entry for equality. |
Object |
getKey()
Returns the key corresponding to this entry. |
Object |
getValue()
Returns the value corresponding to this entry. |
int |
hashCode()
Returns the hash code value for this map entry. |
Object |
setValue(Object value)
Replaces the value corresponding to this entry with the specified value (optional operation). |
Method Detail |
public Object getKey()
public Object getValue()
public Object setValue(Object 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.
IllegalArgumentException
- if some aspect of this value
prevents it from being stored in the backing map.
NullPointerException
- the backing map does not permit
null values, and the specified value is
null.public 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
public 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)