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Difference between Object and Class in Scala

Scala Object vs Class: Here, we are going to learn what are the differences between Objects and classes in Scala which are the concepts of object-oriented programing.
Submitted by Shivang Yadav, on August 05, 2019

Objects vs Classes in Scala

Class in programming is a user-defined blueprint. From this blueprint, the objects are instanced. A class has fields and methods (member function defining the actions).

Class

A class is a user-defined blueprint with contains fields and methods that define the functionality of using its fields and methods.

Declaring a class:

    class myClass{
	    // fields 
	    // methods
    }

Object

In object-oriented programming, objects are used to the real-life entity. These are instances of a class that are made to use the class in a program.

Declaring an object:

    var object_name = new class_name(); 

In Scala, you will use classes and objects very often. Both these concepts are needed for the proper functioning of the Scala program. And all of them have some similarities and differences.

Differences between classes and objects

Let's explore the differences between them,

  • A class is a blueprint whereas an object is an instance. Classes have fields and methods whereas objects have states, behaviors, and identities.
  • An object can exist solo i.e. without a class. To use members of a class either we need to create an object of that class or extend it by other class.
  • Both class and object can extend one class and one or two traits. But only a class can be abstract not a method. One major difference is there inheritance and objects is unique hence it cannot be inherited whereas classes can be inherited.

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