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  Singleton Design Pattern in Java

Singleton is frequently used in applications where resource may be expensive to create and no instance specific state needs to be maintained. For example, when creating database connection, a singleton may be needed. Today we will share the famous Singleton design pattern in Java.1. DefinitionSingleton design pattern is a design pattern that restricts the instantiation of a class to one object. It is one of the most well-known design patterns.2. ApplicationSingleton can be used in many occasions, for example, one database can have only one connection or connection coun...

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