Kotlin vs Java: Which one should be on the cards?

Kotlin is a cross-platform programming language that can run on Java Virtual Machine (JVM). Kotlin is used to develop server-side apps, android apps, etc. Java is a multi-platform, object-oriented programming language. Java is used for mobile app development, desktop apps, web apps, games, etc. Java is one of the most used programming languages as it can run on all platforms that support java.


Table of Contents

  1. Kotlin vs java: Overview

  2. Contrast between Kotlin and java

  3. Pros and Cons: Kotlin and Java

  4. Is Kotlin going to replace Java

  5. Conclusion

Kotlin vs Java: Overview

Kotlin is a programming language which has been in use since 2011. It can be used in android, iOS and desktop apps development. Kotlin is compatible with java as Kotlin provides the option for usage of existing skills and knowledge of java to Kotlin which helps in android app development. Kotlin has understandable coding norms and is more concise and expressive which reduces the chances of error. It’s easier to write and maintain a code in Kotlin. Whereas Java is better for large applications development as it provides lots of functionalities and features to perform on all platforms like android, iOS, windows and Linux. It facilitates direct libraries, a large number of skilled developers and a multi-threaded environment for the purpose of multi-tasking. Java vs Kotlin in android is a matter of concern as we can’t use multiple languages for single application development. Both languages are used by the developers but as per the Google Recommendation, Kotlin is more preferred for android app development.


Contrast between Kotlin and Java

The key difference between Kotlin and Java is the Kotlin and Java code comparison as Kotlin requires less code as it is a concise language whereas Java requires long code. Another one is of Kotlin vs Java thread, as Java is a multi-threaded environment which is helpful in multi-tasking whereas Kotlin has coroutines support which blocks threads after a certain point. And the syntax difference between Java and Kotlin is that there are no unnecessary keywords in Kotlin and the code is also easy for developers to understand whereas in Java it’s not that concise and easy to understand.


Pros and Cons of Kotlin


  1. It allows user to create extension functions
  2. Compatible with Java code
  3. Provides simple- automated code for data class creation



  1. Lack of availability of resources to learn Kotlin
  2. Compilation rate is slow
  3. Switching from Java to Kotlin is difficult


Pros and cons of Java


  1. Java has good memory management
  2. Data sharing is possible among multiple computers
  3. It’s easy to develop and maintain
  4. Secure language



  1. Complex code
  2. No backup facility is available
  3. Java requires huge memory space


Is Kotlin going to replace Java

Kotlin or Java is always a point of question as developers want to be sure about the impact of using these languages on their app performance. But Kotlin will not replace Java as Java is quickly evolving and adopting different features and modern languages, Kotlin is used mainly for android app development and java is still the most used programming language in the world and provides benefits.



Java and Kotlin both have their good sides and bad, which one should be used is purely up to the need of user and scalability goals of the company. For speed and flexibility in your project, Java is the best option and if you want support from Google then Kotlin is the best option. But in the case of Android app development, after considering all the differences & the pros and cons, Kotlin is better than Java as libraries and tools are more Kotlin focused and building apps is easier with Kotlin.

Leave a Reply

Your email address will not be published. Required fields are marked *