Java is an object-oriented programming (OOP) language, so understanding classes and objects is fundamental. Here's a quick guide:

What is a Class?

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

  • Properties (data members)
  • Methods (functions)
  • Constructors (initialization logic)
// Example: A simple Java class  
public class Dog {  
    // Attributes  
    String breed;  
    int age;  

    // Method  
    public void bark() {  
        System.out.println("Woof! 🐶");  
    }  
}
java_class

What is an Object?

An object is an instance of a class. For example: 

Dog myDog = new Dog(); // Creating an object  
myDog.breed = "Golden_Retriever";  
myDog.age = 5;  
myDog.bark(); // Calling a method

Key Concepts

  • Encapsulation: Bundling data and methods into a single unit.
  • Inheritance: Reusing code via parent-child relationships.
  • Polymorphism: Using a single interface for different data types.
object_oriented

Practical Tips

  1. Use new to instantiate objects.
  2. Access modifiers (public, private) control visibility.
  3. Override methods for custom behavior.

For deeper insights, check our Java OOP Principles guide. Happy coding! 🚀