liandk
Jun 13, 2026 · Fundamentals
Singleton Pattern: Simple Explanation, Java Code Samples, and Real‑World Use Cases
The article explains the Singleton pattern—ensuring a class has only one global instance—to save resources and avoid conflicts, illustrates two Java implementations (eager and lazy), and lists typical scenarios such as logging utilities, connection pools, global configuration, and exclusive resources.
Design PatternEager InitializationLazy Initialization
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