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
    EaseFilterCPPExample

    EaseFilterCPPExample

    EaseFilter SDK CPP Example

    A C++ file security filter driver example implemented with EaseFilter File Security Filter Driver SDK. EaseFilter Comprehensive File Security SDK is a set of file system filter driver software development kit which includes file monitor filter driver, file access control filter driver, transparent file encryption filter driver, process filter driver and registry filter driver. In a single solution, EaseFilter Comprehensive File Security SDK encompasses file security, digital rights management, encryption, file monitoring, file auditing, file tracking, data loss prevention, process monitoring and protection, and system configuration protection. EaseFilter file system filter driver is a kernel-mode component that runs as part of the Windows executive above the file system. The EaseFilter file system filter driver can intercept requests targeted at a file system or another file system filter driver.
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  • 2
    Easy Args java command line processing API is designed using annotations and reflection to greatly simplify the tasks involved in argument processing, including required argument detection, automatic type conversion, and the generation of usage help.
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  • 3
    Easy Random

    Easy Random

    The simple, stupid random Java beans/records generator

    Easy Random is a library that generates random Java objects. You can think of it as an ObjectMother for the JVM. The java.util.Random API provides 7 methods to generate random data: nextInt(), nextLong(), nextDouble(), nextFloat(), nextBytes(), nextBoolean() and nextGaussian(). What if you need to generate a random String? Or say a random instance of your domain object? Easy Random provides the EasyRandom API that extends java.util.Random with a method called nextObject(Class type). This method is able to generate a random instance of any arbitrary Java bean. Populating a Java object with random data can look easy at first glance, unless your domain model involves many related classes.
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  • 4
    Easy Rules

    Easy Rules

    The simple, stupid rules engine for Java

    The simple, stupid rules engine for Java. As of December 2020, Easy Rules is in maintenance mode. This means only bug fixes will be addressed from now on. Version 4.1.x is the only supported version. Please consider upgrading to this version at your earliest convenience. Lightweight library and easy-to-learn API. POJO-based development with an annotation programming model. Useful abstractions to define business rules and apply them easily with Java. The ability to create composite rules from primitive ones. The ability to define rules using an Expression Language (Like MVEL, SpEL and JEXL)
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  • 5

    Easy Web automation library

    Easy Web automation library

    This library has been designed to work with selenium for web automation. It has incorporated functions and handled exception from selenium. It uses selenium library for web interfaces.
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  • 6
    EasyPermissions

    EasyPermissions

    Simplify Android M system permissions

    EasyPermissions is a wrapper library to simplify basic system permissions logic when targeting Android M or higher. If your app is written in Kotlin consider the easypermissions-ktx library which adds Kotlin extensions to the core EasyPermissions library. To begin using EasyPermissions, have your Activity (or Fragment) override the onRequestPermissionsResult method. If all of the permissions in a given request are granted, all methods annotated with the proper request code will be executed(be sure to have an unique request code). The annotated method needs to be void and without input parameters (instead, you can use onSaveInstanceState in order to keep the state of your suppressed parameters). This is to simplify the common flow of needing to run the requesting method after all of its permissions have been granted. Optionally, for a finer control, you can have your Activity / Fragment implement the PermissionCallbacks interface.
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  • 7
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  • 8
    EasyStream

    EasyStream

    Java library that ease the task to use streams.

    EasyStream is a Java library that ease the task to use streams. EasyStream is a natural extension of Apache commons-io ( http://commons.apache.org/io/ ), providing advanced solutions to some common but not trivial problem. This library key points are performances, low memory footprint, reduced set of dependencies and simplicity of usage.
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  • 9
    EasyWicket is a library which aims faster development for Wicket (http://wicket.apache.org) projects. It configures wicket components with annotations and minimizes IModel usage.
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  • 10
    The Eclipse Component Info projects aim is to develop an Eclipse plug-in that offers an easy interface/api to retrieve information on installed components of a running Eclipse instance.
    Downloads: 0 This Week
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  • 11
    EjZip

    EjZip

    Java Lib to zip (compress) or unzip (uncompress) files and folders

    Java Lib to zip (compress) or unzip (uncompress) files and folders. Go to project's wiki to see How to Use and Sample Uses of this lib
    Downloads: 0 This Week
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  • 12
    Elements of Programming Interviews

    Elements of Programming Interviews

    Method stubs and test cases for Elements of Programming Interviews

    This repository contains method stubs and tests of the problems from Elements Of Programming Interviews by Adnan Aziz, Tsung-Hsien Lee, and Amit Prakash. This book is also available in Python and C++. This repository contains solutions to problems from the book "Elements of Programming Interviews," focusing on interview preparation and algorithm practice.
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  • 13
    Enhanced Collections is a thin wrapper around commons collections to allow usage of Java 5 generics. Unlike similar projects, this is not a rewrite of commons collections, just an enhancement on top of it.
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  • 14

    EnterAccess

    Full JAVA JDBC Interface to MS Access using Jackcess

    This JDBC interface serves as a full JAVA interface to MS Access files. It was developed to support the Software-Independent Archival of Relational Databases (SIARD) of the Swiss Federal Institute. It is based on the project Jackcess for accessing MS Access files and makes use of the project H2 for parsing SQL. It is an alternative to the JDBC interface UCanAccess, whose metadata and type support and very limited SQL for DDL and DML queries could not be adapted for the purposes of SIARD. Currently EnterAccess queries are limited to a single table. All DML and DDL queries are limited by the capabilities of Jackcess, which is good at reading a database and weak on creating a view, creating foreign keys, or modifying a schema.
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  • 15

    Enumerations

    This project is no longer maintained.

    This project is no longer maintained. Instead use my Java util lib: http://sourceforge.net/projects/util-lib/
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  • 16
    The Environment State Virtual Sensors for Android is a library that allows recognition of environmental scenarios in which an Android device can be found. The basic scenarios types are: Motion states, Noise states, Proximity state, ringer-mode state.
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  • 17
    Epic

    Epic

    Dynamic java method AOP hook for Android

    Epic is a project focused on enabling advanced runtime modifications and enhancements within Android environments, particularly around system behavior and application interaction. It provides tools for hooking and manipulating methods at runtime, allowing developers to intercept and modify application logic dynamically. The framework is designed to work alongside other system-level tools, enabling deeper customization and experimentation. It is commonly used in reverse engineering, debugging, and feature extension scenarios. Epic emphasizes flexibility and control over application execution flow. Its architecture allows developers to explore internal behaviors without modifying original binaries. It serves as a powerful tool for advanced Android development and research.
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  • 18
    Essentials

    Essentials

    General purpose utilities and hash functions for Android and Java

    Essentials is a lightweight collection of high-performance utility classes designed to enhance standard Java and Android development without introducing heavy dependencies. The library focuses on providing efficient data structures and helper utilities that often outperform equivalent components in the standard Java API. It is intentionally minimalistic and is not positioned as a full framework, but rather as a focused toolkit that fills common gaps developers encounter in everyday projects. Essentials emphasizes speed and low footprint, with components such as LongHashMap delivering measurable performance improvements over standard implementations. The library is compatible with both Android and standard Java environments, making it broadly usable across platforms. Overall, Essentials serves developers who want faster and more convenient core utilities without adopting large libraries like Guava or Apache Commons.
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  • 19
    Estimation Reporting
    Its a pure Java Reporting Library and Reportdesigner for viewing, printing, exporting (xls, pdf, html, rtf) of professional looking reports. Supports Text-, Image- and Chart-Fields, multiple Grouping, XML-Templates and different Datasources.
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  • 20
    Excel JSP Tag Library
    A JSP taglibray for creating Excel spreadsheets. Based on Apache POI
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  • 21
    Library of exception utils. Introduce exception handlers used to enable an external object to determine how the exceptions should be handled.
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  • 22
    ExpressionJ is a Java library allowing to interpret simple numeric expressions, which may be used in all applications which have to combine numeric values, but do not want to use full-blown scripting languages.
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  • 23
    You know the component scanning feature of Spring? You'll love this: component scanning as easy as select(javaClasses()).from("your.package").returning(allAnnotatedWith(YourAnnotation.class)). Can support any language running on the JVM. ---------- eXtcos is now also available from Maven Central. To include it into your Maven project just add this dependency: groupId: net.sf.extcos artifactId: extcos version: 0.4b Unfortunately Sourceforge doesn't support XML snippets in the description, so you'll have to build it yourself if needed. ----------- To read the user manual click the website link below.
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  • 24

    External Java Command Control

    Send commands from the command-line to your running application.

    Moved to GitHub https://github.com/fedups ExCon is a small Java class (a runnable Jar file, “sender”) that you run whenever you need to send a command to your application. Your application needs to include the ExCon “receiver”. The receiver accepts the commands from the ExCon sender and processes them. Since the receiver runs within you application it can access all of your application’s classes and resources.
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  • 25
    FABRevealMenu

    FABRevealMenu

    A general purpose Android UI library to show a user show menu

    A simple general-purpose UI library to create a custom user-defied menu in a modern way with your favorite Floating action button. It incorporates a lollipop circular reveal view with cool animations somewhat inspired by Google Material Design guidelines.
    Downloads: 0 This Week
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