What is an object in Object Oriented Programming ?

An Object is instance of class. A class defines type of object. Each object belongs to some class. Every object contains state and behavior. State is determined by value of attributes and behavior is called method. Objects are also called as an instance.

To instantiate the class we declare with the class type.

public classFirstClass {
    public static voidmain(String[] args) {
        FirstClass f = new FirstClass();
        System.out.println(“My First class”);
    }
}

To instantiate the FirstClass we use this statement
FirstClass f=new FirstClass();
f is used to refer FirstClass object.