Attributes
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Runtime API to metadata attributes such as doclet tags.
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BeanUtils
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Easy-to-use wrappers around the Java reflection and introspection APIs.
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Betwixt
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Services for mapping JavaBeans to XML documents, and vice versa.
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Chain
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Chain of Responsibility pattern implemention.
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CLI
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Command Line arguments parser.
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Codec
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General encoding/decoding algorithms (for example phonetic, base64, URL).
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Collections
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Extends or augments the Java Collections Framework.
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Compress
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Defines an API for working with tar, zip and bzip2 files.
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Configuration
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Reading of configuration/preferences files in various formats.
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Daemon
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Alternative invocation mechanism for unix-daemon-like java code.
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DBCP
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Database connection pooling services.
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DbUtils
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JDBC helper library.
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Digester
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XML-to-Java-object mapping utility.
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Discovery
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Tools for locating resources by mapping service/reference names to resource names.
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EL
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Interpreter for the Expression Language defined by the JSP 2.0 specification.
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Email
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Library for sending e-mail from Java.
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Exec
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API for dealing with external process execution and environment management in Java.
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FileUpload
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File upload capability for your servlets and web applications.
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IO
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Collection of I/O utilities.
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JCI
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Java Compiler Interface
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Jelly
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XML based scripting and processing engine.
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Jexl
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Expression language which extends the Expression Language of the JSTL.
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JXPath
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Utilities for manipulating Java Beans using the XPath syntax.
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Lang
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Provides extra functionality for classes in java.lang.
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Launcher
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Cross platform Java application launcher.
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Logging
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Wrapper around a variety of logging API implementations.
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Math
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Lightweight, self-contained mathematics and statistics components.
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Modeler
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Mechanisms to create Model MBeans compatible with JMX specification.
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Net
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Collection of network utilities and protocol implementations.
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Pool
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Generic object pooling component.
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Primitives
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Smaller, faster and easier to work with types supporting Java primitive types.
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Proxy
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Library for creating dynamic proxies.
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Sanselan
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A pure-Java image library.
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SCXML
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An implementation of the State Chart XML specification aimed at creating and maintaining a Java SCXML engine. It is capable of executing a state machine defined using a SCXML document, and abstracts out the environment interfaces.
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Transaction
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Implementations for multi level locks, transactional collections and transactional file access.
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Validator
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Framework to define validators and validation rules in an xml file.
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VFS
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Virtual File System component for treating files, FTP, SMB, ZIP and such like as a single logical file system.
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