Browse free open source Java Libraries and projects below. Use the toggles on the left to filter open source Java Libraries by OS, license, language, programming language, and project status.

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  • 1
    High performance message passing library for multi-threaded and highly concurrent Java applications, where some nodes within the cloud are untrusted. Intended for use in a distributed virtual worlds project, but probably has other interesting uses.
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  • 2
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  • 3
    An open source java 5 API for parsing and obtaining queue metrics from Asterisk PBX log files.
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  • 4
    J2ME MVC framework based on model-view-controller pattern supported ME configurations CLDC and up. - conversation like data transfer between controllers - low memory usage - PL services support TODO: - support of other UI frameworks
    Downloads: 0 This Week
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  • 5
    MicroWSS is a lightweight web services server/toolkit written in Java. Its purpose it to allow for simple development and deployment of services that use SOAP 1.2 and WSDL. It handles everything relating to XML, so that you only need to deal with Java.
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  • 6
    Micronaut Data

    Micronaut Data

    Ahead of Time Data Repositories

    Micronaut Data is a database access toolkit that uses Ahead of Time (AoT) compilation to pre-compute queries for repository interfaces that are then executed by a thin, lightweight runtime layer. Both GORM and Spring Data maintain a runtime meta-model that uses reflection to model relationships between entities. This model consumes significant memory and memory requirements grow as your application size grows. The problem is worse when combined with Hibernate which maintains its own meta-model as you end up with duplicate meta-models. Micronaut Data instead moves this model into the compiler. Both GORM and Spring Data use regular expressions and pattern matching in combination with runtime generated proxies to translate a method definition on a Java interface into a query at runtime. No such runtime translation exists in Micronaut Data and this work is carried out by the Micronaut compiler at compilation time.
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  • 7
    Microproperties is a flexible and extensible library for dealing with properties in applications written in Java ME (former J2ME). Read properties from MIDlet Manifest/JAD, a textfile or over internet via a URL. Set properties as never before in Java ME.
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  • 8
    Moelnir

    Moelnir

    Heap organised database service (Java library)

    Moelnir is a basic database file, addressing variable record data through integer identifiers, which applies heap organisation of its data space. Advantage of Moelnir is that each record is stored in a continuous segment on the file while still record size is limit-less variable and modifiable. There are no data length limits other than the range of a 63-bit unsigned integer. Scalability is limited to 1 - 10 Mio. entries due to non-paging internal structures.
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  • 9
    Monero Java Library

    Monero Java Library

    Java library for using Monero

    A Java library for Monero transactions, enabling integration of Monero functions in Java applications.
    Downloads: 0 This Week
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  • 10
    MongoDB JVM Driver

    MongoDB JVM Driver

    The MongoDB drivers for Java, Kotlin, and Scala

    Welcome to the documentation site for the Java Driver, the MongoDB driver for synchronous Java applications. Download it using Maven or Gradle, or set up a runnable project by following our Quick Start guide. For tutorials on how to use the MongoDB JVM Drivers, please reference MongoDB University. Additional tutorials, videos, and code examples using both the Java Driver and the Kotlin Driver can also be found in the MongoDB Developer Center.
    Downloads: 0 This Week
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  • 11
    Mpaxs

    Mpaxs

    Transparent Local and Remote Parallelization for Java

    Mpaxs provides a simple abstraction for executing Callables and Runnables either locally within the same Virtual Machine, on the same host via RMI, or on remote machines, also via RMI. It supports launching of new compute hosts via an extensible API, currently featuring local compute host launching and grid compute host launching using the DRMAA API.
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  • 12
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  • 13
    Multi-language library to deal with multimethod dispatch, disambiguation and type-checking using dispatch tables. This approach yields fast dispatch in constant-time and greatly helps resolving ambiguities.
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  • 14
    Multi-Queue ThreadPool 4 FSM

    Multi-Queue ThreadPool 4 FSM

    Library for sequential execution of tasks in multithreaded environment

    A special Multi-Queue ThreadPool for Finite State Machines that would execute the tasks in sequential order.
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  • 15

    MultipleKeyListener

    Small java library to handle multiple key events as an implementation of KeyListener

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  • 16

    Mvc Infraestructure

    Serializable Data Transfer Object/Generic Dao for J2EE

    Dto.java and others classes - for data transmission from/to view (with EL - Expression Language" ) layer to/from business and persistence layer in J2EE application. Dto extends from HashMap class of Java API for encapsulate any type of information by key type:key_i.key_ij.key_ijk....: Any component in any J2EE functional chain can access to DTO if they know the key key_i.key_ij.key_ijk.... for object access. This project helps to decouple the data, business logic and persistence logic allowing portability between different frameworks gently.
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  • 17
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  • 18
    My Java Zone Carrusel

    My Java Zone Carrusel

    Efecto carrusel en Java

    Libreria para el uso del efecto carrusel en java.
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  • 19

    My flip-flops

    Assorted useful classes

    A collection of various small classes useful for development with Java eco system. It's free software licensed under a short and easy to understand license. For the name: Imagine walking bare foot on a hot sunny day. The hot sand burns your feet. Now imagine a pair of flip-flops - not exactly amazing tech but simple and useful. There are classes for network stuff, cryptographic and even a full-grown translation system.
    Downloads: 0 This Week
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  • 20
    MyBatis Dynamic SQL

    MyBatis Dynamic SQL

    SQL DSL (Domain Specific Language) for Kotlin and Java

    This library is a general-purpose SQL generator. Think of it as a typesafe and expressive SQL DSL (domain-specific language), with support for rendering SQL formatted properly for MyBatis3 and Spring's NamedParameterJDBCTemplate. The library also contains extensions for Kotlin that enable an idiomatic Kotlin DSL for SQL. The library will generate full DELETE, INSERT, SELECT, and UPDATE statements. The DSL implemented by the library is very similar to native SQL but it includes many functions that allow for very dynamic SQL statements.
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  • 21

    Myth Utilities

    An utilities project to enhance various utility implementations

    An utilities project to enhance various utility implementations .
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  • 22
    Project to treat NMEA sentences.
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  • 23
    NOTUVY regex is a wrapper around the standard Java java.util.regex package. It adds no new functionality, but it make writing sophisticated regex logic simpler and cleaner than the standard package.
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  • 24
    NW.ORM

    NW.ORM

    API based wrapper for Hibernate framework

    Java API wrapper for working with Hibernate.
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  • 25

    NamedParameterConverter

    Converter for named parameters on Java command line call

    The Named-Parameter-Converter accepts named parameters from commandline. Thus it analyzes the args[] string array parameter of the static main method, validates and converts these named parameters. The parameters are converted in Map or Object structure when nothing else is configured. However, you can also convert it into a bean class. More details under https://sourceforge.net/p/namedparameterconverter/wiki/Home/
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