Mirror of Apache Commons Lang

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  1. 30a14e9 In-line single use local variable by Gary Gregory · 3 days ago master
  2. 717f163 Add Streams.of(Iterator) by Gary Gregory · 3 days ago
  3. ec93f3b StringUtils.join(Iterator, String) should only return null when the by Gary Gregory · 3 days ago
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Apache Commons Lang

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Apache Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang.


More information can be found on the Apache Commons Lang homepage. The Javadoc can be browsed. Questions related to the usage of Apache Commons Lang should be posted to the user mailing list.

Where can I get the latest release?

You can download source and binaries from our download page.

Alternatively you can pull it from the central Maven repositories:



We accept Pull Requests via GitHub. The developer mailing list is the main channel of communication for contributors. There are some guidelines which will make applying PRs easier for us:

  • No tabs! Please use spaces for indentation.
  • Respect the code style.
  • Create minimal diffs - disable on save actions like reformat source code or organize imports. If you feel the source code should be reformatted create a separate PR for this change.
  • Provide JUnit tests for your changes and make sure your changes don't break any existing tests by running mvn clean test.

If you plan to contribute on a regular basis, please consider filing a contributor license agreement. You can learn more about contributing via GitHub in our contribution guidelines.


This code is under the Apache Licence v2.

See the NOTICE.txt file for required notices and attributions.


You like Apache Commons Lang? Then donate back to the ASF to support the development.

Additional Resources