Method Detail

• size

  int size()

  Returns the number of entries in the map.

  Returns:

  number of entries in the map

• isEmpty

  boolean isEmpty()

  Tests whether the map is empty.

  Returns:

  true if the map is empty, false otherwise

• get

  V get(K key)

  Returns the value associated with the specified key, or null if no such entry exists.

  Parameters:

  key - the key whose associated value is to be returned

  Returns:

  the associated value, or null if no such entry exists

• put

  V put(K key,
      V value)

  Associates the given value with the given key. If an entry with the key was already in the map, this replaced the previous value with the new one and returns the old value. Otherwise, a new entry is added and null is returned.

  Parameters:

  key - key with which the specified value is to be associated

  value - value to be associated with the specified key

  Returns:

  the previous value associated with the key (or null, if no such entry)

• remove

  V remove(K key)

  Removes the entry with the specified key, if present, and returns its associated value. Otherwise does nothing and returns null.

  Parameters:

  key - the key whose entry is to be removed from the map

  Returns:

  the previous value associated with the removed key, or null if no such entry exists

• keySet

  Iterable<K> keySet()

  Returns an iterable collection of the keys contained in the map.

  Returns:

  iterable collection of the map's keys

• values

  Iterable<V> values()

  Returns an iterable collection of the values contained in the map. Note that the same value will be given multiple times in the result if it is associated with multiple keys.

  Returns:

  iterable collection of the map's values

• entrySet

  Iterable<Entry<K,V>> entrySet()

  Returns an iterable collection of all key-value entries of the map.

  Returns:

  iterable collection of the map's entries