17 best open source java collections projects.

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Displaying 1 to 17 from 17 results

Koloboke - Java Collections till the last breadcrumb of memory and performance

Java

A family of projects around collections in Java (so far). A carefully designed extension of the Java Collections Framework with primitive specializations and more. Java 6+. Apache 2.0 license.

java-collections koloboke annotation-processor primitive-specializations high-performance hashmap collections

Essentials - General purpose utilities and hash functions for Android and Java (aka java-common)

Java

Essentials are a collection of general-purpose classes we found useful in many occasions. This project is bare bones compared to a rich menu offered by Guava or Apache Commons. Essentials is not a framework, it's rather a small set of utilities to make Java standard approaches more convenient or more efficient.

collections java-collections hash-map murmur3 utility library

Vavr - Object-functional language extension to Java

Java

Vavr is an object-functional language extension to Java 8, which aims to reduce the lines of code and increase code quality. It provides persistent collections, functional abstractions for error handling, concurrent programming, pattern matching and much more.

javaslang java8 functional-programming object-functional immutable-collections persistent-collections vavr functional streams collections java-collections

Redisson - Redis based In-Memory Data Grid for Java

Java

Redisson - distributed Java objects and services (Set, Multimap, SortedSet, Map, List, Queue, BlockingQueue, Deque, BlockingDeque, Semaphore, Lock, AtomicLong, Map Reduce, Publish / Subscribe, Bloom filter, Spring Cache, Executor service, Tomcat Session Manager, Scheduler service, JCache API) on top of Redis server. Rich Redis client.

cache distributed-caching distributed-locks redis-client redis-cluster collections java-collections hashmap set queue

Tape - A lightning fast, transactional, file-based FIFO for Android and Java.

Java

A lightning fast, transactional, file-based FIFO for Android and Java. QueueFile is a lightning-fast, transactional, file-based FIFO. Addition and removal from an instance is an O(1) operation and is atomic. Writes are synchronous; data will be written to disk before an operation returns. The underlying file is structured to survive process and even system crashes and if an I/O exception is thrown during a mutating change, the change is aborted.

queue java-collections data-structure collections embedded-queue message-queue

MapDB - Embedded Database Engine

Java

MapDB is an embedded database engine. It provides Maps and other collections backed by disk or memory storage. It offers excellent performance comparable to java collections, but is not limited by GC overhead. It is also a full database engine with storage backends, transactions, cache algorithms, expiration and many other options. MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap memory.

embedded-database database java-collections off-heap cache in-memory key-value-store

Boon - Low Ceremony. High Productivity. A real boon to Java to developers!

Java

The main goal of Boon is to reduce the productivity delta between Java and Python/Groovy/Ruby. The idea is to just create a lower ceremony APIs. Less Java like APIs, and more getting things done quickly APIs. If reading a file takes one line of code in Ruby/Python/Groovy, then it will also in Java. If slice notation is part of those language, then Boon will have it to.

java-collections data-structure utility json-parser collections

bifurcan - impure functional data structures

Java

This library provides high-quality Java implementations of mutable and immutable data structures, each sharing a common API. Rather than using the existing collection interfaces in java.util such as List or Map, it provides its own interfaces (IList, IMap, ISet) that provide functional semantics - each update to a collection returns a reference to a new collection.

data-structure collections immutable map list java-collections

PCollections - A Persistent Java Collections Library

Java

A Persistent Java Collections Library. PCollections serves as a persistent and immutable analogue of the Java Collections Framework. This includes efficient, thread-safe, generic, immutable, and persistent stacks, maps, vectors, sets, and bags, compatible with their Java Collections counterparts.

jvm collections java-collections immutable immutable-collections data-structure

SmoothieMap - A gulp of low latency Java HashMap

Java

SmoothieMap is a Map implementation for Java with the lowest memory usage and absence of rehash latency spikes. Under the hood, it is a version of extendible hashing with 48-slot mini segments. This project also includes a proof-of-concept implementation of SwissTable algorithm in Java.

java-collections hashmap collections openhft low-latency

javatuples - Typesafe representation of tuples in Java.

Java

javatuples is one of the simplest java libraries ever made. Its aim is to provide a set of java classes that allow you to work with tuples.

tuple java-tuple java-collections collections

Big Queue - A big, fast and persistent queue based on memory mapped file.

Java

A big, fast and persistent queue based on memory mapped file.

queue java-collections collections data-structure memory-mapped

FastTuple - Generates heterogeneous collections of primitive values and ensures as best it can that they will be laid out adjacently in memory

Java

FastTuple is a library for generating heterogeneous tuples of primitive types from a runtime defined schema without boxing.

tuples java-collections

Paguro - Immutable Collections and Functional Transformations for the JVM

Java

Immutable Clojure collections and a Transformation abstraction for Java 8+, immutably, type-safely, and with good performance. It provide support for RRB Tree, which is an immutable List (like Clojure's PersistentVector) that also supports random inserts, deletes, and can be split and joined back together in logarithmic time.

immutable-collections rbtree kotlin jvm transformations stream data-structure collections immutable map list java-collections

SmoothieMap - A gulp of low latency Java

Java

SmoothieMap is a java.util.Map implementation with worst put(k, v) operation latencies more than 100 times smaller than in ordinary hash table implementations like java.util.HashMap.

low-latency java-collections hashmap collections openhft