Apache Commons IO

Clone this repo:
  1. 5fbc496 Use try-with-resources and format to 120 line length. by Gary Gregory · 3 weeks ago master
  2. 06f76d5 Use try-with-resources and format to 120 line length. by Gary Gregory · 3 weeks ago
  3. 8937ea3 Clean ups. by Gary Gregory · 3 weeks ago
  4. ee664f0 Javadoc and normalize param names. Line-lengths to 120. by Gary Gregory · 3 weeks ago
  5. c14b996 Resue ClosedWriter.CLOSED_WRITER. by Gary Gregory · 3 weeks ago

Apache Commons IO

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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