Java EE 8 Design Patterns and Best Practices

Explaining Singleton

In a software project, in some solutions, we may want to ensure that a class has only one instance of an object throughout the project and that this object is accessible at any point in the project. Creating a global instance or static instance will not ensure that this class will not be used at another point in another instance. The best way to solve this is by using the Singleton pattern, which ensures that there is only one instance of a class in the entire project. In the following diagram, we are showing the structure of Singleton and how it is designed:

Here, we have one class called Singleton which has a private ...