Method equals

equalshashcode/MapEntry.java:25–32

(Object rval)

    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;
  }