Commons Lang

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Commons Lang
Commons Lang - an extension of the java.lang package

The Apache Commons Lang software library provides a host of helper utilities for the java.lang API, notably String manipulation methods, basic numerical methods, object reflection, concurrency, creation and serialization and System properties. Additionally it contains basic enhancements to java.util.Date and a series of utilities dedicated to help with building methods, such as hashCode, toString and equals. Current support includes:

  • StringUtils - Helper for java.lang.String.
  • CharSetUtils - Methods for dealing with CharSets, which are sets of characters such as [a-z] and [abcdez].
  • RandomStringUtils - Helper for creating randomised Strings.
  • NumberUtils - Helper for java.lang.Number and its subclasses.
  • NumberRange - A range of numbers with an upper and lower bound.
  • ObjectUtils - Helper for java.lang.Object.
  • SerializationUtils - Helper for serializing Objects.
  • SystemUtils - Utility class defining the Java system properties.
  • NestedException package - A sub-package for the creation of nested exceptions.
  • Enum package - A sub-package for the creation of enumerated types.
  • Builder package - A sub-package for the creation of equals, hashCode, compareTo and toString methods.


version 3.3.2 (stable)
released on 9 April 2014

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5 January 2014


This package includes software developed at The Apache Software Foundation ( It also includes software from the Spring Framework, under the Apache License 2.0 (see: StringUtils.containsWhitespace())

Leaders and contributors

Daniel Rall Developer
Paul Benedict Developer
Fredrik Westermarck Developer
Stephen Colebourne Developer
Benedikt Ritter Developer
James Carman Developer
Henri Yandell Developer
C. Scott Ananian Contributor
Niall Pemberton Developer
Steven Caswell Developer
Matt Benson Developer
Robert Burrell Donkin Developer
Joerg Schaible Developer
Gary D. Gregory Developer

Resources and communication

AudienceResource typeURI
developerVCS Repository Webview
UserMailing List
DeveloperMailing List
Debian (Ref) (R)

Software prerequisites

Required to useJava 6.0

This entry (in part or in whole) was last reviewed on 7 March 2018.


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Date 2013-03-20
Source Debian import
Source link


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

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