java.util
Interface Map.Entry<K,V>
A map entry (key-value pair). The Map.entrySet() method returns a set
view of these objects; there is no other valid way to come across them.
These objects are only valid for the duration of an iteration; in other
words, if you mess with one after modifying the map, you are asking
for undefined behavior.
boolean | equals(Object o)- Compares the specified object with this entry.
|
K | getKey()- Get the key corresponding to this entry.
|
V | getValue()- Get the value corresponding to this entry.
|
int | hashCode()- Returns the hash code of the entry.
|
V | setValue(V value)- Replaces the value with the specified object (optional operation).
|
equals
public boolean equals(Object o)
Compares the specified object with this entry. Returns true only if
the object is a mapping of identical key and value. In other words,
this must be:
(o instanceof Map.Entry)
&& (getKey() == null ? ((Map.Entry) o).getKey() == null
: getKey().equals(((Map.Entry) o).getKey()))
&& (getValue() == null ? ((Map.Entry) o).getValue() == null
: getValue().equals(((Map.Entry) o).getValue()))
- equals in interface Object
o - the object to compare
getKey
public K getKey()
Get the key corresponding to this entry.
getValue
public V getValue()
Get the value corresponding to this entry. If you already called
Iterator.remove(), this is undefined.
hashCode
public int hashCode()
Returns the hash code of the entry. This is defined as the
exclusive-or of the hashcodes of the key and value (using 0 for
null). In other words, this must be:
(getKey() == null ? 0 : getKey().hashCode())
^ (getValue() == null ? 0 : getValue().hashCode())
- hashCode in interface Object
setValue
public V setValue(V value)
Replaces the value with the specified object (optional operation).
This writes through to the map, and is undefined if you already
called Iterator.remove().
value - the new value to store
Map.java: interface Map -- An object that maps keys to values
interface Map.Entry -- an Entry in a Map
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