Java vs. Kotlin – Which is the Best for Android App Development

Java vs Kotlin

If you’re planning to create a unique custom Android app for your company—a tool that could boost your business, engage customers, and open up new possibilities, then the choice of programming language is very crucial. That’s where the question of Java vs. Kotlin comes into play!

Although these two leading Android app development languages go hand-in-hand, companies are always confused between Java and Kotlin. But don’t worry; you don’t need to be a tech guru to make this decision. Today’s blog post is your friendly guide, here to help you choose between Java vs. Kotlin and hire dedicated developers that best fit your project needs.

By the end, you’ll not only grasp the differences but also be ready to choose the perfect language between Kotlin and Java for Android development! So, get ready to embark on this exciting journey toward Android app success!

  • Java and Kotlin are two leading Android app development languages that are used by companies worldwide.
  • Brands like Amazon, Minecraft, and eBay used Java for creating their Android apps.
  • Kotlin is also used by many brands like Instagram, Trello, Tinder, and Slack.
  • Companies hire Java developers because of the benefits like versatility, organized codes, strong community support, and more. Whereas, Kotlin is used majorly due to its null safety, concise syntax, etc.
  • While choosing Java vs. Kotlin, always consider your business issues and requirements, and then compare the two to know which one best suit your needs.
  • You can also connect with a trusted staff augmentation service provider like Matellio to explore the two technologies and choose the best for your Android app development project. 

Java – The Versatile Backbone of Android App Development

What is Java?

Java has been the backbone of Android app development for many years. What makes it shine? Well, for one, its versatility is legendary. It’s not just for Android; it’s used in a wide range of applications. Java’s object-oriented nature helps developers keep their code neat and organized, like a well-arranged toolbox. But real magic happens with the Java Virtual Machine (JVM).

Think of it as a language translator for your code. It lets Java run on various platforms, from Android smartphones to Windows PCs, with ease. It’s this adaptability and reliability that has made Java the go-to choice for countless Android app development projects. It’s the dependable companion that makes turning app ideas into reality a whole lot smoother.

Features of Java

Versatility GaloreVersatility Galore

Java is incredibly versatile, like having a toolbox with a tool for every job. Whether you’re building Android apps, web applications, or even software, Java is up to the task.

Object Oriented MagicObject-Oriented Magic

Java is an object-oriented language and excels at structuring and managing code. Think of it as having labeled containers in a super-organized closet; everything has its place, making it easier to find what you need.

Platform Magic TrickPlatform Independence Magic Trick

Java’s real wizardry lies in its platform independence. The Java Virtual Machine (JVM) takes your Java code and talks to different devices in their native tongues. So, whether you’re on an Android phone, a desktop computer, or something else entirely, Java makes sure your code can run smoothly on all of them.

Community SupportStrong Community Support

Java has a massive and active community of developers worldwide. Whether you’re a seasoned pro or just starting, there’s a wealth of knowledge and support waiting for you in the Java community.

Robust SecurityRobust Security

Last but not least, Java’s built-in security features help protect your applications from potential threats and vulnerabilities. So, you can rest easy knowing your apps are well-guarded against cyber-attacks and data breaches.

Hire Java and Kotlin Developers

Pros of Using Java for Android App Development

Here are some magnificent advantages that lure companies to hire Java developers for their projects:

Widespread Adoption

Java is deeply ingrained in the Android development community and has a lot of experienced developers. It’s like having a trusted ally in your app-building journey.

Rich Ecosystem

Java provides a mature collection of libraries, programs, and tools, making development easier. Think of it as your tools simplified, making app creation more efficient and effective.

Seamless Compatibility

Java’s exceptional backward compatibility ensures that your Android apps run smoothly on older devices. It’s a way of bringing the past and present together, reaching a wider audience, and building bridges.

Battle-Tested Reliability

Java has been around for a while, which means it went through countless challenges and emerged as a winner. By choosing Java, you are choosing a reliable and battle-tested language that can easily handle the rigors of Android app development.

Cross-Platform Potential

Java’s “write once, run anywhere” allows you to write code for one platform and use it in others. So, if you ever decide to expand your app beyond Android, you’ll already have a head start.

Also Read- All You Need to Know About the Advantages of Java Development

Cons of Using Java for Android App Development

Like every cloud has a silver lining, so is true for Java. Here are a few cons of using Java for Android app development.

More Lines of CodeWhen compared to Kotlin, Java code tends to be more verbose compared to Kotlin, which can lead to longer development times.
Boilerplate CodeJava developers often find themselves writing boilerplate code, which can be repetitive and error-prone.

Summary of Java

Java for Android App Development

Exploring Kotlin – The Other Hand of Android App Development

What is Kotlin?

Kotlin is a modern and user-friendly programming language. It’s widely used for creating Android apps, and it’s gaining popularity because it’s easy to learn and helps developers write code more efficiently.

Whether you’re a seasoned developer or just starting out, Kotlin can make your app-building journey smoother and more enjoyable. Furthermore, this programming language is an improvement over Java, offering cleaner and more concise code while maintaining full Java interoperability.

Features of Kotlin

Smart Casts of thingsSmart Casts of things

Kotlin’s type system intelligently tracks and drops types, reducing the need for explicit type checking and dropping in your code, resulting in cleaner and safer code.

Expansion WorkExpansion Work

It extends existing classes without modifying their source code, increases the maintainability of the code, and enables new functionality to run in an intuitive and structured way.

Data ClassesData Classes

Kotlin quickly creates static, value-based classes with minimal boilerplate, simplifies product creation, and increases legal clarity.

High Quality FunctionsHigh-Quality Functions

It treats functions as first-class citizens, allows you to pass functions as arguments and return them to other functions, and enables powerful and transparent functional programming.

Pros of Using Kotlin for Android App Development

Here are some excellent benefits that attract companies to hire Kotlin developers for their Android app development projects:

Concise Syntax

Kotlin’s clean, concise code allows developers to express ideas with fewer lines, reducing code complexity and increasing readability, ultimately leading to more efficient development.

Null Safety

Kotlin’s robust type system eliminates null pointing exceptions, ensuring greater stability of the app by enforcing safe handling of nullable and non-nullable values.

Interoperability with Java

Preserve your previous work while seamlessly integrating Kotlin into existing Java projects, gaining the benefits of a more expressive modern language.


Kotlin’s built-in support for coroutines simplifies asynchronous programming, making it easier to manage complex tasks like network calls and background processing, resulting in more efficient and efficient applications.

Cons of Using Kotlin for Android App Development

Similar to Java, Kotlin also has some major disadvantages that limit its use for Android app development.

Learning CurveWhile Kotlin is easier to learn for those with Java experience, it may still pose a slight learning curve for complete beginners.
Smaller CommunityAlthough growing rapidly, Kotlin's community is smaller compared to Java's.

Kotlin for Android App Development

Java vs. Kotlin – What Should You Choose?

Now that you have understood the basics of the two most prominent Android app development languages, it is time to compare them both and decide what to choose for your custom app development project.

Here is a complete overview of Java vs. Kotlin for Android development:

Conciseness and Readability

Java: Java code can be verbose, often requiring a lot of boilerplate code for simple tasks. This large amount of information can make code difficult to read and maintain.

Kotlin: Kotlin’s concise syntax greatly reduces boilerplate code, making your codebase cleaner and more readable. Kotlin, you can express the same idea in fewer lines, increasing developer productivity.

Null Safety

Java: Java has no built-in security, which can lead to frequent zero-pointing exceptions, a common cause of crashes in Android apps.

Kotlin: Kotlin enforces a strict null protection policy, which distinguishes between null and non-null types. This helps prevent null pointer exceptions and ensures greater stability of the app.


Java: Java and Kotlin can coexist in the same project. While Java code can call Kotlin functions and vice versa, the process can sometimes be less complex.

Kotlin: Kotlin is designed to work seamlessly with Java. This means that you can gradually migrate from Java to Kotlin in your Android application, and you can use existing Java libraries without any problems.

Extension Functions

Java: Java does not have extension functionality, making it difficult to add new functionality to existing classes without modifying their source code.

Kotlin: Kotlin’s extension functions allow you to enhance existing classes with new methods without modifying the source code. This results in cleaner, much more modular code.

Data Classes

Java: Creating simple data-holding classes in Java often requires writing long getter and setter methods, which leads to code bloat.

Kotlin: Kotlin data classes facilitate immutable, value-based classes with automatic generation of getters, setters, equals, hashcode, and toString methods, reducing boilerplate.


Java: Managing asynchronous functions in Java often requires complex callback procedures, making code difficult to read and maintain.

Kotlin: Kotlin’s built-in support for coroutines simplifies asynchronous programming, resulting in cleaner and more logical code for handling tasks such as network requests and background processing.

Android Extensions

Java: Requires additional libraries for Android-specific features.

Kotlin: Offers Android extensions, simplifying Android app development.

Syntax Verbosely structured code. Concise and expressive code.
Null SafetyNo built-in null safety, prone to null pointer exceptions.Strong null safety prevents null pointer exceptions.
Extension Functions No extension functions, limited code modularity.Extension functions for adding methods to existing classes.
Community SupportEstablished community but not evolving as rapidly. Growing community, active development, and adoption.
Industry TrendsIt is still widely used in legacy Android projects. Gaining momentum, becoming the preferred choice.
Gradual Migration Limited support for transitioning to Kotlin. Designed for gradual adoption in existing Java projects.
Best Used When You have an existing Java codebase; you are compatible with older Android devices. You want clean and concise code; you want to enhance app’s stability.

Android Development Services

Final Words

In the realm of Android app development, both Java and Kotlin have their strengths and weaknesses. While Java remains a solid choice for Android development, Kotlin offers several advantages that can significantly enhance the development experience. The decision ultimately boils down to your specific project needs and the team’s familiarity with the languages. Whether you choose the familiarity of Java or the modern elegance of Kotlin, both languages can help you create successful Android apps.

Hence, it would be best to consult with the experts before you hire dedicated developers for your project!

That’s Where Matellio Comes In!

As a leading staff augmentation service provider, we are here to help you hire the best developers based on your project requirements. Whether you need to hire dedicated developers, testers, consultants, DevOps engineers, Cloud engineers, or UI/UX designers, we have the best talent to help you convert your idea into a reality.

With our flexible engagement models and scalable services, you can easily scale your hired team throughout the project development phase. We will even assist you with market and competitor analysis, estimations, MVP creation, and business consulting. So, contact us to get your digital transformation journey started! Fill out our form to book a free 30-minute consultation with our experts. 

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