Singleton Design Pattern in Java 🚀 | Real-World Example + Multithreading Explained

Описание: The Singleton Design Pattern is one of the most commonly asked topics in system design and Java interviews — but mastering it means understanding real-world use cases like caching systems and database connections.

In this video, you'll learn:

✅ What is Singleton Design Pattern in Java
✅ Why Singleton is critical for managing shared resources like caches and DB connections
✅ What problems can occur if you don’t use Singleton when needed (e.g., multiple DB connections, memory leaks)
✅ How to convert a normal Java class into a Singleton
✅ Making Singleton work safely in a multithreaded environment
✅ Using synchronized methods to prevent multiple instances
✅ Implementing Double-Checked Locking for better performance
✅ Why the volatile keyword is important in Double-Checked Locking to prevent instruction reordering issues

📚 This video is based on the detailed explanation from https://nailyourinterview.org - Singleton Design Pattern.

Perfect for Java developers, backend engineers, and anyone preparing for system design interviews!

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