Java Class and Object

In Java, a class is a blueprint for creating objects, defining their properties (attributes) and behaviors (methods). Here's an overview with examples:

Class Definition:

• Define a class using the class keyword followed by the class name.
• Example:

class Car {
    String brand;
    int year;

    void drive() {
        System.out.println("Driving the " + brand);
    }
}

Object Creation:

• Create objects of a class using the new keyword followed by the class constructor.
• Example:

Car myCar = new Car();

Accessing Attributes and Methods:

• Access class attributes and methods using the dot (.) operator.
• Example:

myCar.brand = "Toyota";
myCar.year = 2020;
myCar.drive();

Multiple Objects:

• You can create multiple objects of the same class, each with its own set of attributes and behaviors.
• Example:

Car friendCar = new Car();
friendCar.brand = "Honda";
friendCar.year = 2018;
friendCar.drive();

 

Summary

Java's class and object concept allow for the creation of modular and reusable code, promoting code organization and maintainability. Understanding how to define classes, create objects, and access their attributes and methods is essential for building Java applications.