Classes and Objects Fundamentals

Classes and Objects

Fundamental OOP concepts defining blueprint and instances.

Class Example

public class Car {
    String brand;
    int year;
    
    public Car(String brand, int year) {
        this.brand = brand;
        this.year = year;
    }
    
    public void start() {
        System.out.println(brand + " started");
    }
}

Key Points

• Class = blueprint, Object = instance.
• this refers to current object.
• Constructor has same name as class.
• Usage: Car myCar = new Car("Toyota", 2023);.