Constructor Detail

• DefaultKeyValue

  public DefaultKeyValue()

  Constructs a new pair with a null key and null value.

• DefaultKeyValue

  public DefaultKeyValue(K key,
                         V value)

  Constructs a new pair with the specified key and given value.

  Parameters:

  key - the key for the entry, may be null

  value - the value for the entry, may be null

• DefaultKeyValue

  public DefaultKeyValue(KeyValue<? extends K,? extends V> pair)

  Constructs a new pair from the specified KeyValue.

  Parameters:

  pair - the pair to copy, must not be null

  Throws:

  NullPointerException - if the entry is null

• DefaultKeyValue

  public DefaultKeyValue(Map.Entry<? extends K,? extends V> entry)

  Constructs a new pair from the specified Map.Entry.

  Parameters:

  entry - the entry to copy, must not be null

  Throws:

  NullPointerException - if the entry is null

Method Detail

• setKey

  public K setKey(K key)

  Sets the key.

  Overrides:

  setKey in class  AbstractKeyValue<K,V>

  Parameters:

  key - the new key

  Returns:

  the old key

  Throws:

  IllegalArgumentException - if key is this object

• setValue

  public V setValue(V value)

  Sets the value.

  Overrides:

  setValue in class  AbstractKeyValue<K,V>

  Parameters:

  value - the new value

  Returns:

  the old value of the value

  Throws:

  IllegalArgumentException - if value is this object

• toMapEntry

  public Map.Entry<K,V> toMapEntry()

  Returns a new Map.Entry object with key and value from this pair.

  Returns:

  a MapEntry instance

• equals

  public boolean equals(Object obj)

  Compares this Map.Entry with another Map.Entry.

  Returns true if the compared object is also a DefaultKeyValue, and its key and value are equal to this object's key and value.

  Overrides:

  equals in class  Object

  Parameters:

  obj - the object to compare to

  Returns:

  true if equal key and value

• hashCode

  public int hashCode()

  Gets a hashCode compatible with the equals method.

  Implemented per API documentation of Map.Entry.hashCode(), however subclasses may override this.

  Overrides:

  hashCode in class  Object

  Returns:

  a suitable hash code