All classes have constructors, whether you define one or not, because Java automatically provides a default constructor that initializes all member variables to zero. However, once you define your own ...

Constructors is a leading idea that marks the beginning of the lifecycle of every Java object: the prime moments when variables are initialized, or the class is 'new'-ed in code. How constructors work ...

Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications. This Java tutorial teaches you how to declare classes, describe attributes via fields ...

However, constructors and methods have important differences. If you are at all uncertain about this fundamental Java point, you should read this introductory-level tutorial.

What's the benefit of making a private constructor and a public getInstance method? I understand why you would make the constructor private: to keep someone from instantiating a class.