Explores multiple approaches to implementing thread-safe Singleton patterns in Java, including synchronized methods, eager initialization, double-checked locking, Bill Pugh pattern, and enum singletons. Compares their performance trade-offs and provides practical examples with test code to demonstrate thread safety in concurrent environments.
Table of contents
1. Introduction2. The Classic Problem with Singleton3. Synchronized Accessor: Simple and Safe4. Eager Initialization: Thread Safety by Class Loading5. Double-Checked Locking (DCL): Lazy and Efficient6. Bill Pugh Singleton: Lazy and Elegant7. Enum Singleton: The Simplest Thread-Safe Singleton8. ConclusionSort: