K
- the type of keyV
- the type of the valueSerializable
, Map.Entry<K,V>
AbstractMap<K,V>
public static class AbstractMap.SimpleEntry<K,V> extends Object implements Map.Entry<K,V>, Serializable
setValue
method. Instances of this class are not associated with any map nor with any map's entry-set view.SimpleEntry
instances in method Map.entrySet().toArray
.Constructor | Description |
---|---|
SimpleEntry |
Creates an entry representing the same mapping as the specified entry. |
SimpleEntry |
Creates an entry representing a mapping from the specified key to the specified value. |
Modifier and Type | Method | Description |
---|---|---|
boolean |
equals |
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 |
Replaces the value corresponding to this entry with the specified value. |
String |
toString() |
Returns a String representation of this map entry. |
public SimpleEntry(K key, V value)
key
- the key represented by this entryvalue
- the value represented by this entrypublic SimpleEntry(Map.Entry<? extends K,? extends V> entry)
entry
- the entry to copypublic K getKey()
public V getValue()
public V setValue(V value)
public boolean equals(Object o)
true
if the given object is also a map entry and the two entries represent the same mapping. More formally, two entries e1
and e2
represent the same mapping if(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.public int hashCode()
e
is defined to be: (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()
.public String toString()
=
") followed by the string representation of this entry's value.
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
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https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/util/AbstractMap.SimpleEntry.html