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Introduction to Classes

Explore the basics of Java classes and how they serve as blueprints for objects in object-oriented programming. Understand the roles of fields, methods, static members, and access control with private and public keywords. This lesson helps you grasp how to define and use classes to create reusable, maintainable Java code.

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Definition

Classes are the building blocks of programs built using the object-oriented methodology. Objects have certain similar traits - state and behavior. This commonality is provided in a blueprint or template for the instantiation of all similar objects. This blueprint is known as a class.

Body of class #

Java
class className {
  int integer_one;
  String string_one;
}

A Keyword class is used with every declaration of class followed by the name of the class. You can use any className as you want.

Fundamentals

Every class in Java can be composed of the following elements:

  • fields, member variables or instance variables - These are variables that hold data specific to a particular object. For each object of a class, there is one field.

  • member ...