Apache Commons IO

Clone this repo:
  1. e05a955 Fix compiler warnings, use try-with-resources. by Gary D. Gregory · 2 years, 5 months ago trunk
  2. 4232a1f Note deprecated methods in class Javadoc. by Gary D. Gregory · 2 years, 5 months ago
  3. 701d0f0 Deactivate doclint for Java 8+ by Benedikt Ritter · 2 years, 5 months ago
  4. b43d833 Replace 2.5 Release Notes with the correct content. Thanks to Juergen Gaber. by Benedikt Ritter · 2 years, 5 months ago
  5. 8abb692 Added the ObservableInputStream, and the MessageDigestCalculatingInputStream. by Jochen Wiedmann · 2 years, 6 months ago

Apache Commons IO

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 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 PRs 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.


Code is under the Apache Licence v2.


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

Additional Resources