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Add Java as a playable language

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  • ¿Algo no está bien?
#1 0 comentarios 0 reacciones 0 asignados Ver en GitHub

Nadie ha tomado este issue todavía.

Evaluación

Dificultad
4/5
Tiempo estimado
3-5 días
Aptitud para principiantes
55/100
Tipo de issue
Nueva funcionalidad
Claridad
Bien especificado
Estado de actividad
Activo
Stack tecnológico
java, javascript
Área
backend, testing

Línea de trabajo

Start with backend/arena/runner/harness.js, reading pythonProgram and javascriptProgram, LANGUAGES, and starterCode; then inspect backend/tests/ for existing runner tests. Add the Java driver, supported typed starter code, and Judge0 id, then verify representative correct and incorrect solutions against Judge0, run npm test, and run node scripts/check-boundary.js.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

help wanted

Most requested for interview-style practice. Java has no tuple type, so problems with mixed tuples may be left out for Java (see below).

CodeArena runs player code in Python, JavaScript and TypeScript. Adding a language is self-contained and a great way to get into the codebase.

Where the code lives

  • backend/arena/runner/harness.js: one small driver per language. The driver reads {"tests":[{"args":[...]}]} as JSON on stdin, calls the player's function once per test, and prints the per-run marker line followed by a JSON array of { ok, value } / { ok, error }. Copy the shape of pythonProgram / javascriptProgram. The marker nonce must stay per-run.
  • LANGUAGES in the same file: add { label, judge0Id }.
  • starterCode(problem, language): typed starter code built from problem.function (name, params[].type, returns).
  • backend/arena/runner/executors.js: localExecutor only knows node and python3; add your compiler for local development if you like (it is never used in production).

Types the 45 problems use

integer, integer[], integer[][], number[], string, string[], boolean, and tuples: [integer, integer], [integer, integer][], [integer, integer, integer][], [string, integer][], [string, string, string][], [integer, integer, string].

Statically typed languages need a mapping for each of these. If a mixed tuple such as [string, integer] has no clean equivalent in your language, it is fine to leave that problem out for your language rather than force an awkward type: the loader supports per-problem languages via runnableLanguages.

Definition of done

  • Driver plus typed starter code for every problem your language supports.
  • Judge0 language id wired up (Judge0 CE: Java 62, C++ 54, Go 60; confirm on your Judge0 instance).
  • Proof: correct solutions pass and wrong ones fail on a spread of problems (easy, medium, hard, and every type above) against a real Judge0 (docker-compose.judge0.yml in the repo root runs one locally).
  • Tests in backend/tests/ covering the driver output and starter code; npm test stays green.
  • node scripts/check-boundary.js passes.
Lenguaje dominante
JavaScript
Estrellas
0
Forks
2
Sin PR fusionados en 30 d

Preparar el entorno

Primeros pasos

  1. Lee el issue completo y luego la guía de contribución del proyecto.
  2. Comenta en el issue que vas a ocuparte — evita que dos personas hagan lo mismo.
  3. Haz un fork del repositorio y trabaja en una rama.
  4. Abre un pull request que haga referencia al número del issue.

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