Class DualHashBidiMap

  • All Implemented Interfaces:, java.util.Map, BidiMap, IterableMap

    public class DualHashBidiMap
    extends AbstractDualBidiMap
    Commons Collections 3 is in maintenance mode. Commons Collections 4 should be used instead.
    Implementation of BidiMap that uses two HashMap instances.

    Two HashMap instances are used in this class. This provides fast lookups at the expense of storing two sets of map entries. Commons Collections would welcome the addition of a direct hash-based implementation of the BidiMap interface.

    NOTE: From Commons Collections 3.1, all subclasses will use HashMap and the flawed createMap method is ignored.

    Commons Collections 3.0
    See Also:
    Serialized Form
    • Constructor Detail

      • DualHashBidiMap

        public DualHashBidiMap()
        Creates an empty HashBidiMap.
      • DualHashBidiMap

        public DualHashBidiMap​(java.util.Map map)
        Constructs a HashBidiMap and copies the mappings from specified Map.
        map - the map whose mappings are to be placed in this map