net.pwall.util

Class ImmutableMapEntry<K,V>

java.lang.Object

net.pwall.util.ImmutableMapEntry<K,V>

Type Parameters:

K - the key type

V - the value type

All Implemented Interfaces:

Map.Entry<K,V>

public class ImmutableMapEntry<K,V>
extends Object
implements Map.Entry<K,V>

An immutable Map.Entry.

Author:

Peter Wall

Constructor Summary

Constructors

Constructor and Description
ImmutableMapEntry(K key, V value) Construct an ImmutableMapEntry with the given key and value.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object other) Compare with another object for equality.
K	getKey() Get the key.
V	getValue() Get the value.
int	hashCode() This is coded to match exactly the hash calculation used by HashMap.
V	setValue(V value) Modifying operation - not allowed.
String	toString() Create a string representation of this ImmutableMapEntry, in the form "key=value".

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map.Entry

comparingByKey, comparingByKey, comparingByValue, comparingByValue

Constructor Detail

ImmutableMapEntry

public ImmutableMapEntry(K key,
                         V value)

Construct an ImmutableMapEntry with the given key and value.

Parameters:

key - the key

value - the value

Method Detail

getKey

public K getKey()

Get the key.

Specified by:

getKey in interface Map.Entry<K,V>

Returns:

the key

getValue

public V getValue()

Get the value.

Specified by:

getValue in interface Map.Entry<K,V>

Returns:

the value

setValue

public V setValue(V value)

Modifying operation - not allowed.

Specified by:

setValue in interface Map.Entry<K,V>

Throws:

UnsupportedOperationException - (in all cases)

equals

public boolean equals(Object other)

Compare with another object for equality. Any other Map.Entry with the same key and value is considered equal (where the key and value equality tests are done by Objects.equals(java.lang.Object, java.lang.Object).

Specified by:

equals in interface Map.Entry<K,V>

Overrides:

equals in class Object

Parameters:

other - the other object

Returns:

true if the objects are equal

hashCode

public int hashCode()

This is coded to match exactly the hash calculation used by HashMap.

Specified by:

hashCode in interface Map.Entry<K,V>

Overrides:

hashCode in class Object

Returns:

the hash code

toString

public String toString()

Create a string representation of this ImmutableMapEntry, in the form "key=value".

Overrides:

toString in class Object

Returns:

the string representation