Spoon is a library to analyze, transform, rewrite, transpile Java source code (incl Java 9 & Java 10). It parses source files to build a well-designed AST with powerful analysis and transformation API. Made at Inria with ❤️, 🍻 and .
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zielint0 and surli test(refactor): fix checkstyle (#2359)
* refactor: fix checkstyle violation in MavenLauncher.java

* refactor: fix checkstyle violations in MavenLauncherTest.java

* refactor: fix checkstyle violations in EqualTest.java

* refactor: fix checkstyle violations in CompilationTest.java

* refactor: fix checkstyle in GetBinaryFilesTest.java
Latest commit 6ff8661 Aug 10, 2018


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Spoon is an open-source library to analyze, rewrite, transform, transpile Java source code. It parses source files to build a well-designed AST with powerful analysis and transformation API. It fully supports Java 8, Java 9 and Java 10. Spoon is an official Inria open-source project, and member of the OW2 open-source consortium. The official website is available at http://spoon.gforge.inria.fr/.

If you use Spoon for academic purposes, please cite: Renaud Pawlak, Martin Monperrus, Nicolas Petitprez, Carlos Noguera, Lionel Seinturier. “Spoon: A Library for Implementing Analyses and Transformations of Java Source Code”. In Software: Practice and Experience, Wiley-Blackwell, 2015. Doi: 10.1002/spe.2346.

  TITLE = {{Spoon: A Library for Implementing Analyses and Transformations of Java Source Code}},
  AUTHOR = {Pawlak, Renaud and Monperrus, Martin and Petitprez, Nicolas and Noguera, Carlos and Seinturier, Lionel},
  JOURNAL = {{Software: Practice and Experience}},
  PUBLISHER = {{Wiley-Blackwell}},
  PAGES = {1155-1179},
  VOLUME = {46},
  URL = {https://hal.archives-ouvertes.fr/hal-01078532/document},
  YEAR = {2015},
  doi = {10.1002/spe.2346},

Getting started in 2 seconds

Get latest stable version with Maven:


And start using it:

CtClass l = Launcher.parseClass("class A { void m() { System.out.println(\"yeah\");} }");

Some examples about the usage of Spoon can be found on spoon-examples.

Contributing in 2 seconds

Create your first pull-request to improve the documentation, see doc! Proceed with your first bug fix! The community is open-minded, respectful and patient. All external contributions are welcome.

Design Philosophy

R1) The Spoon metamodel is as close as possible to the language concepts.

R2) The Spoon model of a program is complete and sound.

R3) The text version of a Spoon model is well-formed and semantically equivalent to the original program.

R4) The analysis and transformation API is intuitive and regular.

R5) Transformation operators are designed to warn as fast as possible about invalid programs. This is done either with static type checking or with dynamic checks when the operators are used.

R6) When feasible, the text version of a Spoon model is close to the original one.


To compile Spoon, you need a Java Development Kit (JDK) and Maven:

git clone https://github.com/INRIA/spoon
cd spoon
mvn compile

To run the tests:

mvn test


Stable version:


Snapshot version:

      <name>Maven Repository for Spoon Snapshots</name>

Eclipse IDE Setup

In order to generate the Eclipse project files required for importing run the following commands from the root spoon directory (requires Maven):

mvn eclipse:clean
mvn eclipse:eclipse


See http://spoon.gforge.inria.fr/ecosystem.html

On Youtube


Alphabetical order of last names

  • Olivier Barais
  • David Bernard
  • Benjamin Danglot
  • Benoit Cornu
  • Didier Donsez
  • Favio DeMarco
  • Christophe Dufour
  • Thomas Durieux
  • Alcides Fonseca
  • Sebastian Lamelas Marcote
  • Romain Leventov
  • Matias Martinez
  • Martin Monperrus
  • Carlos Noguera
  • Gérard Paligot
  • Renaud Pawlak
  • Nicolas Pessemier
  • Nicolas Petitprez
  • Phillip Schichtel
  • Lionel Seinturier
  • Marcel Steinbeck
  • Simon Urli
  • Pavel Vojtechovsky
  • Stefan Wolf