Java Platform Apache Commons

Generic object pooling component.

Byte Code Engineering Library

General encoding/decoding algorithms (for example phonetic, base64, URL).

Defines an API for working with tar, zip and bzip2 files.

Collection of I/O utilities.

Reading of configuration/preferences files in various formats.

Virtual File System component for treating files, FTP, SMB, ZIP and such like as a single logical file system.

XML based scripting and processing engine.

Component for reading and writing comma separated value files.

Java Caching System.

Library for sending e-mail from Java.

JDBC helper library.

File upload capability for your servlets and web applications.

Provides extra functionality for classes in java.lang.

Expression language which extends the Expression Language of the JSTL.

Command Line arguments parser.

Framework to define validators and validation rules in an xml file.

Collection of network utilities and protocol implementations.

Commons Rng provides implementations of pseudo-random numbers generators.

Common implementation of RDF 1.1 that could be implemented by systems on the JVM.

Provides an easy way to enhance (weave) compiled bytecode.

Easy-to-use wrappers around the Java reflection and introspection APIs.

Extends or augments the Java Collections Framework.

Database connection pooling services.

Lightweight, self-contained mathematics and statistics components.

API for dealing with external process execution and environment management in Java.

Wrapper around a variety of logging API implementations.

An Object-Graph Navigation Language.

Java Compiler Interface.

Alternative invocation mechanism for unix-daemon-like java code.

A functor is a function that can be manipulated as an object, or an object representing a single, generic function.

XML-to-Java-object mapping utility.

Bean Scripting Framework

A pure-Java image library.

An implementation of the State Chart XML specification aimed at creating and maintaining a Java SCXML engine.

Utilities for manipulating Java Beans using the XPath syntax.

Chain of Responsibility pattern implementation.

Library for creating dynamic proxies.

Redesign of Commons BeanUtils.

Find Class interfaces, methods, fields, and annotations without loading.

Redesign of Commons CLI.

Commons-Convert aims to provide a single library dedicated to the task of converting an object of one type to another.

Java library inspired by the UNIX find command.

Java library for working with flat data structures.

A general purpose Graph APIs and algorithms.

Adds the feature of localized message bundles that consist of one or many localized texts that belong together.

Id is a component used to generate identifiers.

Continuation implementation to capture the state of the application.

JNet allows to use dynamically register url stream handlers through the java.net API.

Monitoring aims to provide a simple but extensible monitoring solution for Java applications.

Nabla provides automatic differentiation classes that can generate derivative of any function implemented in the Java language.

Interface to signing and verifying data using OpenPGP.

A small framework for microbenchmark clients, with implementations for Commons DBCP and Pool.

Provides a set of pipeline utilities designed around work queues that run in parallel to sequentially process data objects.