Author: Cesar Augusto Guzman Alvarez @cguz

Co-Author: Jonas Cir @JonasCir

This is a command line tool based on the version web-application. Thus, all the credits for the original author of the web-application.

The application is a small help when trying to port Java-Code to Rust.

The author is a beginner in rust, so the generated code will sometimes be kind of "unrusty".

Run mvn package and find your java2rust.jar in the project's target folder.

$ java -jar java2rust.jar -d [path_file.java | path_directory]

The converted files will be saved in the folder: "output"

• might be of use:

  • conversion of declarations Java: "Type name = init" to "let name: Type = init"
  • conversion of arrays type[] to vectors
  • snake-case for camelcase-identifiers starting with lower case
  • mapping of primitive types
  • &self as first parameter in non static methods
  • new type becomes type::new
  • class becomes struct with its instance-variables
  • class-methods can be found in extra block impl for { }
  • decide about usage of mut
  • conversion of integer-constants to float-constants where necessary
  • conversion of Exceptions into Results
  • static methods are called using ::
  • @Test is converted to #[test]
  • interfaces become traits
  • Java methods with declared throws return Result<_,Rc> used rust code can be found in directory rust.

• experimental

  • conversion of throw to break loop with label
  • mvn-assembly-plugin
  • convert camel-cased file names to snake-cased names

• very experimental certainly wrongly done:

  • super-classes become instance-variables

• what does not change

  • javadoc-comments