Java Best Practices

A solid reference card for modern Java patterns and idioms. You get naming conventions,Enum-based singletons, factory and builder patterns with actual snippets, plus practical examples for Streams, Optional, and ExecutorService. The code samples use current Java syntax like switch expressions, which is good to see. It's basically the cheat sheet you'd want open when doing code review or onboarding someone to a Java codebase. The pattern examples are brief but real, not pseudocode. Worth having around if you're enforcing standards across a team or just want quick reminders of idiomatic ways to handle common scenarios without Googling.

skills.sh installs: 164
GitHub stars: 238
last updated: Aug 21, 2026

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Install

$ npx -y skills add leavesfly/jimi --skill java-best-practices --agent claude-code

Installs into .claude/skills of the current project.

Files

Java 最佳实践技能包

编码规范

命名规范

类名：PascalCase（UserService）
方法/变量：camelCase（getUserById）
常量：UPPER_SNAKE_CASE（MAX_SIZE）
包名：小写（com.example.service）

常用设计模式

单例模式（枚举实现）：

public enum Singleton {
    INSTANCE;
    public void doSomething() {}
}

工厂模式：

public class UserFactory {
    public static User createUser(String type) {
        return switch (type) {
            case "admin" -> new AdminUser();
            case "guest" -> new GuestUser();
            default -> new RegularUser();
        };
    }
}

Builder 模式：

User user = User.builder()
    .name("张三")
    .age(25)
    .build();

Stream API

List<String> names = users.stream()
    .filter(u -> u.getAge() > 18)
    .map(User::getName)
    .collect(Collectors.toList());

异常处理

try {
    // 业务逻辑
} catch (SpecificException e) {
    log.error("Error: {}", e.getMessage(), e);
    throw new BusinessException("操作失败");
} finally {
    // 清理资源
}

并发编程

ExecutorService executor = Executors.newFixedThreadPool(10);
executor.submit(() -> {
    // 异步任务
});

Optional 使用

SKILL.md on GitHub

Details

Repository: github.com/leavesfly/jimi
Category: Java & JVM
First seen: Jun 3, 2026