Object-Oriented Programming is the backbone of Java, and understanding classes and objects is essential for building scalable and maintainable software.
By modeling real-world entities as classes and objects, Java allows developers to create modular programs that are easy to understand, debug, and reuse.
In Java, a class is a blueprint for creating objects. It defines the structure and behavior (data members and methods) of the objects.
An object is an instance of a class. When a class is instantiated using the new keyword, an object is created in memory with its own copy of the class’s attributes and methods.
.) operator.Learn the basics of class and object creation in Java with examples.
class Car {
String color;
int speed;
void drive() {
System.out.println("The car is driving at " + speed + " km/h.");
}
}
public class Main {
public static void main(String[] args) {
Car myCar = new Car();
myCar.color = "Red";
myCar.speed = 120;
myCar.drive();
}
}
class Student {
String name;
int age;
void showDetails() {
System.out.println(name + " is " + age + " years old.");
}
}
public class School {
public static void main(String[] args) {
Student s1 = new Student();
s1.name = "Alice";
s1.age = 20;
s1.showDetails();
Student s2 = new Student();
s2.name = "Bob";
s2.age = 22;
s2.showDetails();
}
}
Represent vehicles like cars, bikes, and buses as objects with behavior and state.
Create objects for students, teachers, and classes in education systems.
Patients, doctors, appointments are modeled as objects for hospital management.
A class is a blueprint or template, while an object is an instance of that class.
Objects are created using the new keyword, which allocates memory for the object.
Yes, multiple objects can be created from the same class, each with its own state and behavior.