goldziher - Java 17+ LTS, records for immutable data, sealed classes for restricted hierarchies, pattern matching.
- A consistent style guide and auto-formatter (e.g., Google Java Style + google-java-format). Static analysis (e.g., Error Prone + SpotBugs).
- Build: Maven or Gradle with wrapper scripts (
mvnw/gradlew). Commit wrapper files. - Testing: JUnit 5 with
@ParameterizedTest, an assertion library (e.g., AssertJ), a coverage tool (e.g., JaCoCo) at 80%+. - Benchmarking: JMH for microbenchmarks — never use
System.nanoTime()loops. - Error handling: specific exceptions only, never
catch (Exception), use try-with-resources forAutoCloseable. varfor obvious types,Optional<T>for returns (never params/fields),finalfields by default.- Prefer constructor injection over field injection for DI. Immutable collections:
List.of(),Map.of(). - Streams for collection transforms,
instanceofpattern matching, switch expressions. - Security: OWASP
dependency-checkMaven/Gradle plugin for CVE scanning. - Dependencies: commit lock files, use BOM for version alignment, avoid
SNAPSHOTin releases. - Anti-patterns: public fields, mutable static state, raw types, checked exceptions in lambdas.
Java Conventions by goldziher · 4cf73c7
npx skillmds@latest add goldziher/java-conventions File contents
---name: java-conventionsdescription: Java code conventions covering Java 17+ records and sealed classes, formatting/static analysis, Maven/Gradle, JUnit 5, exception handling, constructor injection, streams, and security. Load when writing or reviewing Java code.---- Java 17+ LTS, records for immutable data, sealed classes for restricted hierarchies, pattern matching.- A consistent style guide and auto-formatter (e.g., Google Java Style + google-java-format). Static analysis (e.g., Error Prone + SpotBugs).- Build: Maven or Gradle with wrapper scripts (`mvnw`/`gradlew`). Commit wrapper files.- Testing: JUnit 5 with `@ParameterizedTest`, an assertion library (e.g., AssertJ), a coverage tool (e.g., JaCoCo) at 80%+.- Benchmarking: JMH for microbenchmarks — never use `System.nanoTime()` loops.- Error handling: specific exceptions only, never `catch (Exception)`, use try-with-resources for `AutoCloseable`.- `var` for obvious types, `Optional<T>` for returns (never params/fields), `final` fields by default.- Prefer constructor injection over field injection for DI. Immutable collections: `List.of()`, `Map.of()`.- Streams for collection transforms, `instanceof` pattern matching, switch expressions.- Security: OWASP `dependency-check` Maven/Gradle plugin for CVE scanning.- Dependencies: commit lock files, use BOM for version alignment, avoid `SNAPSHOT` in releases.- Anti-patterns: public fields, mutable static state, raw types, checked exceptions in lambdas.
goldziher/ai-rulez/tree/main/internal/builtins/languages/java/skills/java-conventions commit 4cf73c7b41
Frequently asked questions
Run npx skillmds@latest add goldziher/java-conventions in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.
Java code conventions covering Java 17+ records and sealed classes, formatting/static analysis, Maven/Gradle, JUnit 5, exception handling, constructor injection, streams, and security. Load when writing or reviewing Java code. It is listed under Security on SkillMD.
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goldziher (@goldziher) published this skill. Their other Agent Skills are listed on their SkillMD profile.