Collections
A Persistent Java Collections Library
Last Release on Jul 23, 2025
MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap memory. It is a fast, scalable and easy to use embedded Java database.
Last Release on Jan 10, 2024
Types that extend and augment the Java Collections Framework.
Last Release on Nov 12, 2015
Relocated → org.apache.commons »
commons-collections4
Utility library for collections, comparators and iterator classes
Last Release on Oct 8, 2024
Google Collections with OSGi manifest entries
Last Release on Sep 24, 2024
Relocated → com.google.guava »
guava
16.JavaEWAH104 usages
com.googlecode.javaewah » JavaEWAH Apache
The bit array data structure is implemented in Java as the BitSet class. Unfortunately, this fails to scale without compression.
Last Release on Mar 9, 2023
17.Turbulence Core16 usages
dev.soundness » turbulence-core Apache
Simple tools for working with data streams in LazyLists in Scala
Last Release on Feb 12, 2026
This artifact provides efficient implementations for various collection data structures
(esp. linked lists and priority queues), which have very insufficient implementation in
the Java Collections Framework that makes it hard or even ...
Last Release on Mar 11, 2025
19.SparseBitSet75 usages
com.zaxxer » SparseBitSet Apache
An efficient sparse bitset implementation for Java
Last Release on Sep 6, 2023
Persistent collections based on 2-3 finger trees.
Last Release on Dec 31, 2025
