Java Basics: Understanding Class and Object for Beginners

Hello everyone 👋
This is my Day 2 learning blog on Java programming.
As a beginner, I’m sharing what I learned about Class and Object in a simple and easy-to-understand way.

If you are new to Java, this blog will help you understand the foundation of Java and OOP.

🔹 What is a Class in Java?

A class is a blueprint or template used to create objects.
• It defines properties (variables) and behaviors (methods)
• A class does not occupy memory until an object is created

Example:

class Student {
    int id;
    String name;
}

Here, Student is a class with two variables: id and name.

🔹 What is an Object in Java?

An object is an instance of a class.
• Objects represent real-world entities
• Memory is allocated when an object is created
• Objects are created using the new keyword

Example:

Student s1 = new Student();

Here, s1 is an object of the Student class.

🔹 Real-World Analogy
• Class → Blueprint of a house
• Object → Actual house built from the blueprint

You can create many objects from one class.

🔹 Conclusion

Understanding Class and Object is the foundation of Java and OOP.
Once this concept is clear, learning advanced Java topics becomes much easier.

This is what I learned on Day 2 of Java, and I’ll continue sharing my journey. 🚀