Press ESC to close

Kotlin vs. Java: The Battle of Languages in Android Development


In order to create modern Android apps, aspiring developers want to know which language they should be knowledgeable in. You’re in the proper place if you’re puzzled about Kotlin vs. Java. Both Java and Kotlin are well-liked programming languages. The two fully rule, especially in the field of Android programming, as you’ll see. You must comprehend the distinctions between Kotlin and Java if you wish to create Android apps and get employment in this enormous industry. This article will walk you through the differences between Java and Kotlin and help you decide which is preferable for creating Android apps: Java or Kotlin.Here you will get all the answers if you are comparing Kotlin with Java to see which is best.

What is Kotlin?

Let’s first define Kotlin so we can go on to the Kotlin vs. Java debate. The development of Android applications has made Kotlin, like Java, a well-liked programming language. This is clear from the fact that Kotlin support is included in Android Studio, just like it is for Java. While Java has a wider range of uses, Kotlin is mostly used to construct Android applications. The easiest way to think of it is as an enhanced version of Java for Android development. Additionally, it is entirely compatible with Java, which makes the transfer much simpler.


  • Kotlin is very readable and fully compatible with Java.
  • The greatest option for cross-platform programming is that it compiles with JavaScript and has good Java compatibility.
  • Due to its concise code style, it experiences fewer crashes, system failures, and problems.
  • In comparison to other programming languages, it improves productivity when used with different IDEs and is simpler to maintain.
  • Kotlin features a quicker compilation rate and stops apps from getting bigger.


  • It gets challenging to go from Java to Kotlin if developers have very little experience with it.
  • Kotlin has an extremely difficult learning curve, making it challenging to comprehend.
  • Being a relatively new language, it has a tiny development community.
  • In comparison to other languages, Kotlin has relatively poor initial code readability.

What is Java?

High-level, class-based, and object-oriented are all characteristics of the 1995 programming language known as Java. It is controlled by Oracle and is present on more than 3 billion devices globally. It is commonly used in web servers, desktop and mobile applications, and Android apps. There are several professional prospects, and the language is highly supported by the community. Big data, financial services, retail, and banking are among industries that heavily rely on Java.


  • Java can run on any platform and has robust code and security features.
  • The creation of modular apps is made simple by code reuse.
  • Due to its “write once, run anywhere” nature and lack of installation requirements, Java may be used on any platform.
  • The usage of explicit points that aid in reducing security risks and threats is not supported by Java.
  • Because of its multithreaded environment, it makes it possible to complete several tasks at once.
  • To assist and support the nascent developers, there is a sizable open-source community of skilled professionals.


  • Java uses more memory than other native languages and has a convoluted JVM that slows down performance.
  • The fact that Java lacks a data backup feature is its major flaw.
  • Java’s extremely complicated coding structure makes it harder to read the code.
  • Java is expensive because it uses a lot of memory.

Which language is preferred?

Despite the fact that both have a fair share of advantages and disadvantages, it is still unclear which is superior. So, let’s take a different tack and focus on the main distinctions between Java and Kotlin.

The competition between Kotlin and Java currently has Kotlin in the lead. However, Java will likely continue to be used because it is fundamental to the creation of Android apps. It appears that Kotlin will continue to lead thanks to the contemporary UI framework being created in Kotlin and the open community avoiding Java. Both Kotlin and Java compile to bytecode when it comes to performance. However, given that Kotlin’s build time was significantly longer, Java outperformed Kotlin in terms of clean build time. For complete builds, Kotlin’s compilation speed is lower than Java’s. Kotlin compiles just as quickly as Java when it comes to incremental partial builds.

Java usability problems are caused by app crashes and system faults. Kotlin, on the other hand, utilizes a fail-fast coding method, allowing developers to see potential problems early on and provide a patch. Kotlin is more useful than Java because of its extension functions, the ability to create data classes, language scripting, built-in operators, smart casts, and type interference.

Final Words

Despite their differences, Java and Kotlin are completely compatible, according to this article on Java vs. Kotlin for Android. Both Kotlin and Java may be compiled to bytecode. This implies that Kotlin may invoke Java code and vice versa. This flexibility offers two advantages. First of all, progressively incorporating Kotlin code into a Java project makes it simpler to get started with Kotlin. Second, any effort to produce an Android application can utilize both languages simultaneously.



Ankita Guha is an insightful and creative content writer with over a year of experience. Upon completing her Master’s Degree, she embarked on a content writing career. She currently works as a Content Writer for DigitilizeWeb, providing services like mobile app development, android app development services uk, WordPress development, e-commerce solutions, etc. Her areas of expertise include content writing and technical writing. Through her work, Ankita aims to convey information in a way that educates and inspires readers.


Contact Us

HeKnowsTech is a technology & news blog which provides you updates from Technology world and latest news from all around the world.