The standard Java libraries fail to provide enough methods for manipulation of its core classes. The Lang Component provides these extra methods.
The 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, basic enhancements to java.util.Date and a series of utlities dedicated to help with building methods, such as hashCode, toString and equals.
A getting started user guide is available together with various project reports.
The JavaDoc API documents are available online:
The subversion repository can be browsed.
The latest version is v2.1. -
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The upgrade notes are also available.
In addition there is a JDiff report on the differences between 2.0 and 2.1.
For previous releases, see the Apache Archive
The commons mailing lists act as the main support forum. The user list is suitable for most library usage queries. The dev list is intended for the development discussion. Please remember that the lists are shared between all commons components, so prefix your email by [lang].
Issues may be reported via ASF Bugzilla. Please remember that Bugzilla is shared between all commons components, so prefix your issue by [lang].