Package org.apache.commons.collections4.multiset

package org.apache.commons.collections4.multiset
Implements the MultiSet interface. A multiset stores an object and a count of the number of occurrences of the object.

The following implementations are provided in the package:

  • HashMultiSet - implementation that uses a HashMap to store the data

The following decorators are provided in the package:

  • Predicated - ensures that only elements that are valid according to a predicate can be added
  • Synchronized - synchronizes method access for multithreaded environments
  • Unmodifiable - ensures the multiset cannot be altered