Java Best Practice Checker

by Larbi Wiran

Expert Java code auditor for SE 8–24, flagging performance leaks, threading risks, and modernization gaps.

Free

106 installs5.0 (1 review)

Works with the AI tools you already use

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See it in action

You say

Can you review this Java code for me? It's a method that builds a report by looping through a list and adding strings together using the plus operator.

Your agent does

🔴 Issue 1 — Concatenation in loop (Report.build) Each += allocates a new String; O(n²) performance. // ✅ Fix StringBuilder sb = new StringBuilder(); for (var item : list) { sb.append(item); } return sb.toString();

| # | Location | Category | Issue | Severity | |---|---|---|---|---| | 1 | Report.build() | Strings | Loop concat | 🔴 High |

About this skill

What it does

This skill performs an exhaustive, automated audit of Java source code ranging from SE 8 through the latest SE 24 features. It acts as a specialized static analysis engine that identifies violations of modern best practices, concurrency hazards, and architectural anti-patterns.

Why use this skill

Unlike standard linters, this skill provides deep context and "why it matters" explanations for every flag. It helps developers modernize legacy codebases by suggesting Java 21+ features like Record Patterns and Virtual Threads, while simultaneously catching classic "silent killers" like String Pool bypasses and thread-safety bugs in Singletons.

Supported areas

Modern Syntax: Pattern matching (SE 21), Unnamed variables (SE 22), Stream Gatherers (SE 24).
Core Performance: String handling, wrapper class caching, and JIT-friendly coding patterns.
Collections: Deep analysis of the Collections Framework and the new SequencedCollection API.
Architecture: Dependency injection, OOP encapsulation, and Design Pattern implementations.
JVM Internals: Garbage collection awareness, memory leak detection, and resource management.

The Output

The skill generates a structured report featuring severity-coded issues (🔴/🟡/🟢), root-cause analysis, and side-by-side "Fix" code blocks. Every review concludes with a professional Summary Table for quick triage by lead developers or PR reviewers.

code-review

java

jvm

performance-optimization

software-architecture