Mirror of Apache Commons IO

Clone this repo:
  1. 544f060 Only create wrapper set once. by Gary Gregory · 13 hours ago master
  2. ce8d7e0 Variation of PR #227 from Rob Spoor (robtimus) but does not add a new class. by Gary Gregory · 16 hours ago
  3. 8a681ea Variation of PR #227 from Rob Spoor (robtimus) but does not add a new class. by Gary Gregory · 16 hours ago
  4. 4b7cc53 Merge entries for junit-pioneer. by Gary Gregory · 19 hours ago
  5. c6170b7 Bump checkstyle from 8.41 to 8.42 #225. by Gary Gregory · 19 hours ago

Apache Commons IO

Build Status Coverage Status Maven Central Javadocs

The Apache Commons IO library contains utility classes, stream implementations, file filters, file comparators, endian transformation classes, and much more.


More information can be found on the Apache Commons IO homepage. The Javadoc can be browsed. Questions related to the usage of Apache Commons IO 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 IO? Then donate back to the ASF to support the development.

Additional Resources