Apache Commons BCEL

Clone this repo:
  1. d18eae6 Bump actions/checkout from 4.1.2 to 4.1.3 (#302) by dependabot[bot] · 4 hours ago master
  2. 7d1c4c7 Bump github/codeql-action from 3.24.10 to 3.25.1 (#303) by dependabot[bot] · 4 hours ago
  3. 86194e2 Bump actions/upload-artifact from 4.3.1 to 4.3.2 (#304) by dependabot[bot] · 4 hours ago
  4. 93cf485 Bump codecov/codecov-action from 4.2.0 to 4.3.0 (#301) by dependabot[bot] · 7 days ago
  5. 19c959a Bump commons-io:commons-io from 2.16.0 to 2.16.1 #300 by Gary Gregory · 11 days ago

Apache Commons BCEL

Java CI Coverage Status Maven Central Javadocs CodeQL OpenSSF Scorecard

Apache Commons Bytecode Engineering Library


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

Getting the latest release

You can download source and binaries from our download page.

Alternatively, you can pull it from the central Maven repositories:



Building requires a Java JDK and Apache Maven. The required Java version is found in the pom.xml as the maven.compiler.source property.

From a command shell, run mvn without arguments to invoke the default Maven goal to run all tests and checks.


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 existing code style for each file.
  • 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.

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 licensed under the Apache License v2.

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


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

Additional Resources

Apache Commons Components

Please see the list of components