Q 27 - Classes and Objects

[HARSHITH-MV]

Explain classes and objects in java

[AmjustGettingStarted]

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🧱 Classes and Objects in Java

Java is an object-oriented programming language, and its core building blocks are classes and objects.

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🏗️ What is a Class?

A class is a blueprint or template for creating objects. It defines:

• Fields (variables)
• Methods (functions)
• Constructors
• Access modifiers

✅ Example:

class Car {
    String color;
    int speed;
void drive() {
    System.out.println("Car is driving");
}

}

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🧍 What is an Object?

An object is an instance of a class. It represents a real-world entity with state and behavior.

✅ Example:

public class Main {
    public static void main(String[] args) {
        Car myCar = new Car(); // Object creation
        myCar.color = "Red";
        myCar.drive();         // Method call
    }
}

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🔍 Key Differences

Feature	Class	Object
Definition	Blueprint or template	Instance of a class
Memory	No memory until instantiated	Occupies memory when created
Purpose	Defines structure and behavior	Represents actual data and actions

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🧠 Real-Life Analogy

• Class: Think of a recipe for a cake.
• Object: The actual cake made using that recipe.

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