Master Java Optional Class | Avoid NullPointerException with Java 8 Features | Dev Portal Tutorial

Описание: Welcome back to Dev Portal!
In this tutorial, we’ll explore one of the most game-changing features of Java 8 - the Optional Class!

If you’ve ever been frustrated by the dreaded NullPointerException, this video is for you. Learn how the Optional class can help you write cleaner, safer, and more readable Java code by handling null values effectively.

What You'll Learn in This Video:
📌 What is the Optional Class?
Understand why Optional was introduced in Java 8.
Learn its benefits: Avoid NullPointerException, functional programming, and improved readability.

📌 How to Create Optional Objects:
Using Optional.of(value)
Using Optional.ofNullable(value)
Using Optional.empty()

📌 Accessing Values in Optional:
Safely retrieve values using get(), orElse(), and orElseGet().
Perform actions with ifPresent() and handle missing values.

📌 Real-World Example:
See Optional in action with a User Management System that simulates a database lookup.
Learn how to handle missing users and null emails gracefully.

📌 Advanced Techniques with Optional:
Chain operations using filter(), map(), and orElse().
Avoid common pitfalls by replacing get() with safer alternatives.

📌 Key Takeaways:
Best practices for using Optional to eliminate manual null checks.
How Optional reduces code complexity while improving safety and readability.

Code Examples Included:
✅ Creating Optional objects.
✅ Handling null values effectively.
✅ Real-world database simulation with a UserRepository.
✅ Advanced techniques for chaining operations and transforming data.

📝Notes: https://github.com/nakulmitra/java-tu...

Chapters for Quick Navigation:
0:00 - Introduction
0:21 - What is the Optional Class?
0:49 - Code demonstration for NullPointerException
4:25 - Creating Optional Objects
6:28 - Accessing Values in Optional
8:15 - Conditional Actions with ifPresent() method
8:59 - Combining Optional Methods
10:41 - Real-World Example
14:51 - Advanced Optional Techniques
15:08 - Key Takeaways
17:15 - Conclusion

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💬 Have questions about the Optional class or real-world use cases? Drop them in the comments below.

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