🎯 What is Object-Oriented Programming?

Object-Oriented Programming (OOP) is a programming paradigm based on the concept of "objects", which can contain data and code to manipulate that data. Java is a pure object-oriented language (except for primitive types).

🏗️ Classes and Objects

A class is a blueprint for creating objects. An object is an instance of a class.

                    class Car {
                        String color;
                        void drive() {
                            System.out.println("Car is driving");
                        }
                    }
                    
                    public class Main {
                        public static void main(String[] args) {
                            Car myCar = new Car();
                            myCar.color = "Red";
                            myCar.drive();
                        }
                    }
                    

🛠️ Constructors

A constructor is a special method that is called when an object is created.

                    class Car {
                        String color;
                    
                        // Constructor
                        Car(String c) {
                            color = c;
                        }
                    
                        void drive() {
                            System.out.println(color + " car is driving");
                        }
                    }
                    
                    public class Main {
                        public static void main(String[] args) {
                            Car myCar = new Car("Blue");
                            myCar.drive();
                        }
                    }
                    

🔧 Methods

Methods define behavior for objects. You can also pass parameters and return values.

                    class Calculator {
                        int add(int a, int b) {
                            return a + b;
                        }
                    }
                    
                    public class Main {
                        public static void main(String[] args) {
                            Calculator calc = new Calculator();
                            System.out.println(calc.add(5, 3));
                        }
                    }