// equalshashcode/MapEntry.java

// (c)2017 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

// A simple Map.Entry for sample Map implementations

import java.util.*;

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;

}

@Override

public K getKey() { return key; }

@Override

public V getValue() { return value; }

@Override

public V setValue(V v) {

V result = value;

value = v;

return result;

}

@Override

public int hashCode() {

return Objects.hash(key, value);

}

@SuppressWarnings("unchecked")

@Override

public boolean equals(Object rval) {

return rval instanceof MapEntry &&

Objects.equals(key,

((MapEntry<K, V>)rval).getKey()) &&

Objects.equals(value,

((MapEntry<K, V>)rval).getValue());

}

@Override

public String toString() {

return key + "=" + value;

}

}