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The standard Java libraries fail to provide enough methods for manipulation of its core classes. The Commons Lang Component provides these extra methods. The Commons Lang Component provides a host of helper utilities for the java.lang API, notably String manipulation methods, basic numerical methods, object reflection, creation and serialization, and System properties. Additionally it contains an inheritable enum type, an exception structure that supports multiple types of nested-Exceptions and a series of utilities dedicated to help with building methods, such as hashCode, toString and equals.
The standard Java libraries fail to provide enough methods for manipulation of its core classes. The Commons Lang Component provides these extra methods. The Commons Lang Component provides a host of helper utilities for the java.lang API, notably String manipulation methods, basic numerical methods, object reflection, creation and serialization, and System properties. Additionally it contains an inheritable enum type, an exception structure that supports multiple types of nested-Exceptions and a series of utilities dedicated to help with building methods, such as hashCode, toString and equals. With version of commons-lang 3.x, developers decided to change API and therefore created differently named artifact and jar files. This is the new version, while apache-commons-lang is the compatibility package.
The commons-logging package provides a simple, component oriented interface (org.apache.commons.logging.Log) together with wrappers for logging systems. The user can choose at runtime which system they want to use. In addition, a small number of basic implementations are provided to allow users to use the package standalone. commons-logging was heavily influenced by Avalon's Logkit and Log4J. The commons-logging abstraction is meant to minimize the differences between the two, and to allow a developer to not tie himself to a particular logging implementation.
Commons Math is a library of lightweight, self-contained mathematics and statistics components addressing the most common problems not available in the Java programming language or Commons Lang.
Commons Modeler makes the process of setting up JMX (Java Management Extensions) MBeans easier by configuring the required meta data using an XML descriptor. In addition, Modeler provides a factory mechanism to create the actual Model MBean instances.
This is an Internet protocol suite Java library originally developed by ORO, Inc. This version supports Finger, Whois, TFTP, Telnet, POP3, FTP, NNTP, SMTP, and some miscellaneous protocols like Time and Echo as well as BSD R command support. The purpose of the library is to provide fundamental protocol access, not higher-level abstractions.
OGNL is an expression language for getting and setting properties of Java objects, plus other extras such as list projection and selection and lambda expressions.
The Project Object Model files for the apache-commons packages.
The goal of Pool package is it to create and maintain an object (instance) pooling package to be distributed under the ASF license. The package should support a variety of pool implementations, but encourage support of an interface that makes these implementations interchangeable.
A common issue when receiving data either electronically or from user input is verifying the integrity of the data. This work is repetitive and becomes even more complicated when different sets of validation rules need to be applied to the same set of data based on locale for example. Error messages may also vary by locale. This package attempts to address some of these issues and speed development and maintenance of validation rules.