Package org.apache.commons.collections4.bag

Class HashBag<E>

  • Type Parameters:
    E - the type of elements in this bag
    All Implemented Interfaces:
    java.io.Serializable, java.lang.Iterable<E>, java.util.Collection<E>, Bag<E>
    public class HashBag<E>
extends AbstractMapBag<E>
implements java.io.Serializable
    Implements Bag, using a HashMap to provide the data storage. This is the standard implementation of a bag.

    A Bag stores each object in the collection together with a count of occurrences. Extra methods on the interface allow multiple copies of an object to be added or removed at once. It is important to read the interface javadoc carefully as several methods violate the Collection interface specification.

    Since:
    3.0 (previously in main package v2.0)
    See Also:
    Serialized Form

    • Constructor Detail

      • HashBag

        public HashBag()
        Constructs an empty HashBag.

      • HashBag

        public HashBag​(java.util.Collection<? extends E> coll)
        Constructs a bag containing all the members of the given collection.
        Parameters:
        coll - a collection to copy into this bag