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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.
12 min readApr 30, 2025
🧾 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.
