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What is an Object?

• An object is a real-world entity created from a class.
• It has:
  • State (fields/variables)
  • Behavior (methods/functions)
An object is an instance of a class.

How to create an Object?

    
    ClassName objectName = new ClassName();
    
    

Example:

    
    class Car {
        String brand;
        int year;

        void displayInfo() {
            System.out.println(brand + " - " + year);
        }
    }

    public class Main {
        public static void main(String[] args) {
            Car myCar = new Car();  // Object created

            myCar.brand = "Tesla";
            myCar.year = 2022;

            myCar.displayInfo();    // Method called using object
        }
    }
    
    

Output:

    
    Tesla - 2022
    
    

Real Life Example

Real World	Java
"Dog" (concept)	class Dog {}
"Tommy", "Bruno" (actual dogs)	Dog tommy = new Dog(); Dog bruno = new Dog();

Important Points about Objects

• Object creation happens using the new keyword.
• Object stores data separately (each object can have different values).
• Dot (.) operator is used to access fields and methods.

Example:

    
    myCar.brand = "BMW";  // Accessing field
    myCar.displayInfo();  // Calling method
    
    

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