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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 Jul 8, 2017
fastutil extends the Java Collections Framework by providing type-specific maps, sets, lists and priority queues with a small memory footprint and fast access and insertion; provides also big (64-bit) arrays, sets and lists, and fast, practical I/O classes for binary and text files.
Last Release on Jun 21, 2017
The Apache Commons Collections package contains types that extend and augment the Java Collections Framework.
Last Release on Nov 25, 2015
Types that extend and augment the Java Collections Framework.
Last Release on Nov 12, 2015
The Trove library provides high speed regular and primitive collections for Java.
Last Release on Jun 4, 2012
A high performance version of java.util.LinkedHashMap for use as a software cache.
Last Release on Jan 28, 2015
Google Collections Library is a suite of new collections and collection-related goodness for Java 5.0
Last Release on Dec 30, 2009
Highly Scalable Java
Last Release on Nov 28, 2011
High Performance Primitive Collections. Fundamental data structures (maps, sets, lists, stacks, queues) generated for combinations of object and primitive types to conserve JVM memory and speed up execution.
Last Release on Oct 25, 2016