Class HashMapIntLong

    • Constructor Detail

      • HashMapIntLong

        public HashMapIntLong()
        Create a map of default size
      • HashMapIntLong

        public HashMapIntLong​(int initialCapacity)
        Create a map of given size
        Parameters:
        initialCapacity - in entries.
    • Method Detail

      • put

        public boolean put​(int key,
                           long value)
        Add a mapping
        Parameters:
        key - the key
        value - the corresponding value
        Returns:
        true if an entry with the key already exists
      • remove

        public boolean remove​(int key)
        Remove an mapping from the map
        Parameters:
        key - the key to remove
        Returns:
        true if entry was found
      • containsKey

        public boolean containsKey​(int key)
        find if key is present in map
        Parameters:
        key - the key
        Returns:
        true if the key was found
      • get

        public long get​(int key)
        Retrieve the value corresponding to the key
        Parameters:
        key - the key
        Returns:
        the value
        Throws:
        NoSuchElementException - if the key is not found
      • getAllKeys

        public int[] getAllKeys()
        Get all the used keys
        Returns:
        an array of the used keys
      • size

        public int size()
        The number of mappings
        Returns:
        the size of the map
      • isEmpty

        public boolean isEmpty()
        Is the map empty
        Returns:
        true if no current mappings
      • clear

        public void clear()
        Remove all the existing mappings, leaving the capacity unchanged.
      • keys

        public IteratorInt keys()
        Get a way of iterating over the keys
        Returns:
        an iterator over the keys
      • values

        public IteratorLong values()
        Get a way of iterating over the values.
        Returns:
        an iterator over the values
      • getAllValues

        public long[] getAllValues()
        Get all the values corresponding to the used keys. Duplicate values are possible if they correspond to different keys.
        Returns:
        an array of the used values