7 Common Java Code Smells You Should Fix Immediately in Your Real-Time Project 📚

Discover 7 common Java code smells and how to fix them. Learn practical, real-world examples to improve your Java code quality, readability, and maintainability.

🧾 Introduction

Even experienced Java developers sometimes leave behind code smells —
patterns that make code harder to understand, maintain, or extend.

✅ Code smells are not bugs.
✅ But they are warnings that something is wrong in your design.

In this guide, you’ll learn 7 common Java code smells every developer must recognize — and how to fix them with working examples.

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Let’s go 👇

✅ 1. Long Methods

When a method becomes too long and tries to handle multiple responsibilities, it becomes:

• Hard to read
• Hard to maintain
• Hard to test
• More error-prone when requirements change

This smell violates the Single Responsibility Principle (SRP), one of the most important pillars of clean coding.