package thinkinginjava.containers;

// A simple Map.Entry for sample Map implementations.

import java.util.Map;

public class MapEntry<K, V> implements Map.Entry<K, V> {

private K key;

private V value;

public MapEntry(K key, V value) {

this.key = key;

this.value = value;

}

public K getKey() {

return key;

}

public V getValue() {

return value;

}

public V setValue(V v) {

V result = value;

value = v;

return result;

}

public int hashCode() {

return (key == null ? 0 : key.hashCode())

^ (value == null ? 0 : value.hashCode());

}

public boolean equals(Object o) {

if (!(o instanceof MapEntry))

return false;

MapEntry me = (MapEntry) o;

return (key == null ? me.getKey() == null : key.equals(me.getKey()))

&& (value == null ? me.getValue() == null : value.equals(me

.getValue()));

}

public String toString() {

return key + "=" + value;

}

}