Class Double2CharMaps


  • public final class Double2CharMaps
    extends Object
    A class providing static methods and objects that do useful things with type-specific maps.
    See Also:
    Collections
    • Field Detail

      • EMPTY_MAP

        public static final Double2CharMaps.EmptyMap EMPTY_MAP
        An empty type-specific map (immutable). It is serializable and cloneable.
    • Method Detail

      • fastIterator

        public static ObjectIterator<Double2CharMap.Entry> fastIterator​(Double2CharMap map)
        Returns an iterator that will be fast, if possible, on the entry set of the provided map.
        Parameters:
        map - a map from which we will try to extract a (fast) iterator on the entry set.
        Returns:
        an iterator on the entry set of the given map that will be fast, if possible.
        Since:
        8.0.0
      • fastIterable

        public static ObjectIterable<Double2CharMap.Entry> fastIterable​(Double2CharMap map)
        Returns an iterable yielding an iterator that will be fast, if possible, on the entry set of the provided map.
        Parameters:
        map - a map from which we will try to extract an iterable yielding a (fast) iterator on the entry set.
        Returns:
        an iterable yielding an iterator on the entry set of the given map that will be fast, if possible.
        Since:
        8.0.0
      • singleton

        public static Double2CharMap singleton​(double key,
                                               char value)
        Returns a type-specific immutable map containing only the specified pair. The returned map is serializable and cloneable.

        Note that albeit the returned map is immutable, its default return value may be changed.

        Parameters:
        key - the only key of the returned map.
        value - the only value of the returned map.
        Returns:
        a type-specific immutable map containing just the pair &lt;key,value&gt;.
      • singleton

        public static Double2CharMap singleton​(Double key,
                                               Character value)
        Returns a type-specific immutable map containing only the specified pair. The returned map is serializable and cloneable.

        Note that albeit the returned map is immutable, its default return value may be changed.

        Parameters:
        key - the only key of the returned map.
        value - the only value of the returned map.
        Returns:
        a type-specific immutable map containing just the pair &lt;key,value&gt;.
      • synchronize

        public static Double2CharMap synchronize​(Double2CharMap m)
        Returns a synchronized type-specific map backed by the given type-specific map.
        Parameters:
        m - the map to be wrapped in a synchronized map.
        Returns:
        a synchronized view of the specified map.
        See Also:
        Collections.synchronizedMap(Map)
      • synchronize

        public static Double2CharMap synchronize​(Double2CharMap m,
                                                 Object sync)
        Returns a synchronized type-specific map backed by the given type-specific map, using an assigned object to synchronize.
        Parameters:
        m - the map to be wrapped in a synchronized map.
        sync - an object that will be used to synchronize the access to the map.
        Returns:
        a synchronized view of the specified map.
        See Also:
        Collections.synchronizedMap(Map)
      • unmodifiable

        public static Double2CharMap unmodifiable​(Double2CharMap m)
        Returns an unmodifiable type-specific map backed by the given type-specific map.
        Parameters:
        m - the map to be wrapped in an unmodifiable map.
        Returns:
        an unmodifiable view of the specified map.
        See Also:
        Collections.unmodifiableMap(Map)