Technical Notes

In Java programming, understanding the distinction between 'class' and 'object' is essential. While they are related concepts, each serves a distinct purpose in object-oriented programming. What is a Class? A class in Java is a blueprint or template that defines the structure and behavior of objects. It contains attributes (fields) and methods that define the object's state and behavior. Here's a simplified definition: "A class is a static piece of code that defines the attributes and methods shared by all instances (objects) of that class." What is an Object? An object is an instance of a class. It represents a specific entity that exists at runtime and has its own state (attributes) and behavior (methods). Unlike classes, objects are dynamic and exist only during the program's execution: "An object is a specific instance of a class, created at runtime with its own set of attributes...

When considering a Java program, it consists of objects communicating by invoking each other's methods. Let's delve into the concepts of classes, objects, methods, and instance variables: Object - Objects in Java encapsulate states (e.g., color, name, breed) and behaviors (e.g., wagging, barking, eating). Each object is an instance of a class. Class - A class serves as a blueprint or template defining the behaviors and states that objects of its type support. Methods - Methods represent the behaviors of a class. They contain the logic, manipulate data, and execute actions within a program. Instance Variables - Every object possesses its own set of instance variables. These variables determine the state of an object by holding assigned values. First Java Program: Let's start...