Code Formatting

JADX enforces code style using two Gradle-integrated tools: Spotless (formatting) and Checkstyle (style rule checks). Both tools use config files that can be imported into IDEs.

Prerequisite: Gradle wrapper (./gradlew) must be available in the repository root.

Tools

Spotless

• Purpose: Reformats all source code using Eclipse formatter; fails the build if any diff exists after reformatting.
• Formatter config location: config/code-formatter/
• IDE integration:
  • Eclipse: Import config files directly.
  • IntelliJ IDEA: Use the Eclipse Code Formatter plugin.

Apply formatting manually:

1./gradlew spotlessApply

Checkstyle

• Purpose: Checks code style issues not covered by formatting — unused imports, naming conventions, etc.
• Config location: config/checkstyle/
• IDE integration: Most IDEs have Checkstyle plugins that run checks in real time.

Running All Checks

Run formatting + style checks without executing tests:

1./gradlew spotlessApply
2./gradlew check -x test

Checks also run automatically during a full build:

1./gradlew build

Recommended Pre-commit Workflow

1./gradlew spotlessApply        # Auto-fix formatting
2./gradlew check -x test        # Verify all style checks pass
3# Repeat until check -x test exits with no errors