Implementing Singleton Design Pattern in Java: Lazy and Eager Initialization

Implementing Singleton in Java

Implementing the Singleton pattern in Java can be done in various ways, each with its own advantages and considerations. Two common methods are Lazy Initialization and Eager Initialization.

Lazy Initialization

Lazy Initialization is a technique where the instance of the class is created only when it is needed. This approach is memory efficient, as the instance is not created at class loading time. However, it is not thread-safe without additional synchronization.

Eager Initialization

In Eager Initialization, the instance of the Singleton class is created at the time of class loading. This approach is simpler and thread-safe but may consume more memory as the instance is created irrespective of whether it’s needed or not.

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