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Kotlin Object vs Class

Kotlin Object vs Class

Difference Between Kotlin Object vs Class

Kotlin object vs class is supported in the functional application, which was developed into the kotlin. Object and class is the basic concept in every object-oriented programming language, as we know that kotlin supports object-oriented and functional programming language. While providing the support in object-oriented programming, the kotlin will support the inheritance, object class, and encapsulation. Object and class are very important in kotlin.

Basically, kotlin is the statistically typed language; kotlin was built over into java so that it will inherit all the object-related java concepts from java. In kotlin, class is nothing but the blueprint of the entity that was showing in runtime. The kotlin object is nothing but a state, which includes the state behavior. In kotlin, we are declaring the class by using the class body and header, which are surrounded by curly braces; this same functionality is available in java. When defining any class into the kotlin, we use the class keyword and then need to define the class name. We need to define a unique class name for the whole project.

The duplicate class name is not accepted in the same project while working with kotlin. In kotlin, different types of classes are available, like nested class and inner class. As we are creating several objects from the same class, also in kotlin, we can create multiple objects by using a single class. After creating the class and objects, we are free to include the members and functions of a class. In kotlin, we can control the visibility of class member variables by using keywords that were different. Kotlin almost supports the JVM, so that kotlin will introduce the concept of the object at the top level. Whereas class in kotlin will describe the structure which was instantiated as and when we have desired and allowing us in many instances when needed. In kotlin, the object will represent the static instance that was single.

What is Kotlin Object?

This feature is very useful in multiple techniques in packaging and singleton objects. In kotlin object is very useful and important for sharing the common properties of the class. The object of kotlin is created by using the class of kotlin. Also, it will share the common behavior and properties which was defined by the class in the form of member function and the data members. We can access the properties and methods of a class by using (.) operator. Below syntax shows to declare the class object as follows. In the below example, var and val are used to declare the variable which was used in a kotlin object. By using var and val, we are declaring the specified variable. By using the class, we are creating the object.

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Syntax:

var name_of_var = name_of_class()
val name_of_var = name_of_class()

The below example shows the kotlin object as follows. In the below example, we are creating kotlin and its object from which we are accessing the data from class.

Code:

class student
{
private var stud_name: String = "ABC"
fun printMe ()
{
print ("Stud name:-" + stud_name)
   }
}
fun main(args: Array<String>) {
val stud = student()
stud.printMe ()
}

Output:

Kotlin Object vs Class 1

What is the Class?

The class is the blueprint of the object, which defines the template used to create the required objects. In kotlin, classes are the building block; a class is defined by using the keyword as a class. Below syntax is showing to create a class in kotlin as follows. The class declaration of kotlin is similar to java consisting of the class body and the class header surrounded by curly braces.

Syntax:

class name_of_class
{
    …..
}

By default, the classes of kotlin are public. We can control the class visibility by using the different modifiers. The below example shows kotlin’s class as follows.

Example:

Code:

fun main(args: Array<String>)
{
val stud = student.school()
print (stud.foo())
   }
class student {
   class school {
     fun foo() = "Student name ABC"
  }
}

Output:

Kotlin Object vs Class 2

Head-to-Head Comparison Between Kotlin Object vs Class (Infographics)

Below are the top 11 differences between Kotlin Object vs Class:

info

Key Difference Between Kotlin Object vs Class

Let’s see the key differences between Kotlin Object vs Class:

  • The class in kotlin its object contains similar properties. At the time of class, using kotlin, we need to define some before creating the object. When creating a class, we need to define the class’s name, the class’s header, and the class body. The header and the class body are optional in the class declaration. If suppose nothing into curly braces, then the body of the class is omitted.
  • An object is a basic unit of object-oriented programming that will represent the entities in real life that contain the behavior and states. Basically in kotlin object is used to access the member function properties from the class. While using kotlin language, we can create multiple objects from a single class.
  • Every class contains its specific name in kotlin. The class header in the kotlin class consists of constructors and parameters of the class. The body of class is surrounded with curly braces. If suppose we want to provide a class name as a constructor, then we only need to write the constructor keyword just after the name of the class.
  • State in kotlin object will represent the object attribute. It was also reflecting the object properties. The behavior will represent the object method. It is also reflecting the object’s response to other objects. The object identity will give the unique name of the object which was interacting with another object.

Kotlin Object vs Class Comparison Table

Let’s discuss the top comparison between Kotlin Object vs Class:

Sr. No Kotlin Object

Kotlin Class

1 Kotlin is supporting the class object while developing the application. Kotlin is supporting the different types of class while developing applications.
2 Kotlin object is similar to the objects in java. Kotlin classes are similar to the objects in java.
3 We can create multiple objects from a single class. We can create multiple nested class in a single code.
4 In kotlin, we are using object declaration to create a singleton class. We are creating multiple objects by using a single class.
5 The object contains only one type in kotlin language. Kotlin class contains multiple types.
6 Kotlin object contains a single object which was created by the class. We create the singleton class in kotlin language.
7 Kotlin compiler will translate singleton objects into the class. Kotlin class is not translated after declaring the same in our code.
8 We can create unique objects in a single class. For creating the class, we need to define a unique name.
9 We can instantiate the object from a class that was concrete. In kotlin, we cannot instantiate the class.
10 We cannot inherit the object by using class in kotlin. We can inherit the class from the parent class by using inheritance.
11 Object is a very important concept while using kotlin. Class is a very important concept while using kotlin.

Conclusion

In kotlin, class is nothing but the blueprint of the entity that was showing in runtime. Object and class is the very basic concept in every object-oriented programming language. Kotlin object vs class is supporting in the functional application, which was developed into the kotlin.

Recommended Articles

This is a guide to Kotlin Object vs Class. Here we discuss Kotlin Object vs Class key differences with infographics and a comparison table. You may also have a look at the following articles to learn more –

  1. Kotlin vs Scala
  2. Kotlin vs Swift
  3. Java vs Kotlin
  4. Flutter vs Kotlin
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