Singleton is to ensure there is only a single instance of a class in our app.
To have a singleton of a class, there are few things necessary to do.
- Create a private & static instance as a field inside the class.
- Create a method to get the instance (for others to access this instance)
And how to use it?
- Make sure the constructor is set private, so that others cannot instantiate the class freely.
Whole code:
