The Singleton pattern is deceivingly simple, especially for Java developers. In this article, I’ve demonstrated how Java developers implement singletons, considering multithreading, classloaders ...

Singleton Pattern The Singleton Pattern restricts the instantiation of a Class and ensures that only one instance of the class exists in the Java Virtual Machine (JVM).

In using the Singleton pattern, you use a global instance and hide the dependencies. The dependencies are hidden inside your code and are not exposed through interfaces.