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Kotlin vs Java: Important Differences That You Must Know

Java was launched in 1995 by Sun Microsystem which is a subsidiary of Oracle and Kotlin was officially released in 2016 by JetBrains. Kotlin is a statically-typed, open source programming language. It is designed to be interoperable with Java and provide a cleaner, simpler, and a faster mixture of object-oriented, and functional programming. Kotlin is the brainchild of JetBrains and in 2011 they unveiled Project Kotlin, which served as a new language for the Java Virtual Machine. JetBrains set out to create a new language, with all of the features they needed, and the compile speed of Java.

It is difficult to compare Kotlin and Java in terms of difficulty because both languages are somewhat similar. So, knowing what language is best for a certain situation is important. As you can see, the Kotlin code is shorter and simpler than the equivalent Java code. This is one of the main reasons why Kotlin is often considered easier to use than Java. Choosing Kotlin vs Java is no walk in the park, but it’s all coming down to your project. The JVM itself is dependent on the operating system on which it is run, acting as a processor or “virtual” machine.

Kotlin vs Java: comparison table

As was explored previously, final keyword sometimes has an effect on performance, and often it’s a small but positive one. In this blog, we will dive into their differences and explore their syntax, job demands, applications, features, and more. As a developer, you must constantly decide which programming language to use for your next project.In the case of Android development, two of the most popular options are Java and Kotlin. Kotlin is often used for developing Android apps, as well as web applications and server-side applications. The language is also commonly used for developing cross-platform applications that can run on multiple operating systems. Before we jump into the Kotlin vs Java debate, let’s first take a step back and look at getting a general understanding of what programming languages are and how they evolved.

Differences Between Kotlin and Java

According to data from Glassdoor, the median salary for a Java developer in the United States is around $95K per year, while the median salary for a Kotlin developer is $105K per year. This is a complex task in Java, whereas Kotlin has a straightforward coroutines solution. While its predecessor, Java, is limited to object-oriented programming, Kotlin combines that with features of functional programming as well. The latter is interoperable with the former and can be called from existing Java code naturally, having a rich set of libraries that provide wide-ranging functionalities. Java is a versatile, Object-Oriented, high-level programming language with numerous features that make it an attractive choice for developers.

Difference between Kotlin and Java

Hence, you will not see any Kotlin app crashing at run-time due to a null pointer because it detects any possible NullPointerExceptions at compile time. Java has been around since 1995 – over two decades – and has a mature developer ecosystem, which includes a significant number of libraries, frameworks, and tools. Because of this, Java applications perform very well, and it has enjoyed a lot of performance optimizations since its inception. Kotlin doesn’t support implicit widening conversions for numbers, so smaller types aren’t implicitly converted to bigger types. In Kotlin, if you want to assign a value of type Byte to an Int variable, then you’ll need to perform an explicit conversion, whereas Java has support for implicit conversions.

Differences Between Kotlin and Java

Using Java, we can create a variety of applications such as desktop applications, enterprise applications, cloud-based, and web-based applications. Java is the primary choice for the developers when it comes to Android app development. If you use Kotlin for your app project, you do not have to deal with any such problem. The Kotlin feature of incorporating data classes can fix this issue. For storing data in a class, developers need to define a class using the keyword “data.” This step will automatically produce the typical boilerplate code during compile time.

Infographic On Difference Between Kotlin and Java in Android

Support has grown for the option too overtime, to the point that this decision now mainly comes down to preference. On the other hand, more developers and organizations are adopting Kotlin to rapidly develop Android applications. This additional overhead can be avoided by inlining the lambda expressions in Kotlin. The traditional solution for the problem in Java is to create a background thread for the long-running or intensive work.

  • For example, there may be certain features that you prefer to write in Kotlin, and certain features that you find easier to write in Java.
  • Despite this, Kotlin’s performance has been steadily improving and developers anticipate it will become at least as performant as Java, if not more so, in the near future.
  • Spark Framework, not to be confused with Apache Spark, was originally a web framework for Java development, and it now supports Kotlin.
  • So, Java developers, fret not for you would find it easy to delve in using Kotlin for android development.
  • Ktor offers strongly-typed endpoints and makes it possible to exchange data across platforms.
  • KOTLIN is a cross platform, statically types, general purpose programming language with type inference.

Also, these depend on how developers write the code using the language. Kotlin involves functional methods, including operator overloading, lazy evaluation, and higher-order functions. So, if you have a functional programming background, you can easily learn Kotlin.

Difference Between == and === in Kotlin.

Coroutines are stackless, which means they demand lower memory usage as compared to threads. This Kotlin vs Java head-to-head comparison breaks down the similarities and differences between the two. If you’re eager for a quick summary of the differences, we’ve posted a table below. After that, you‘ll find a more detailed explanation of the differences. Though no longer the only officially supported language for Android development and, of course, far from the only choice for web programming, Java keeps pace with the alternatives.

Although these two languages are both used in application development, they have some differences in their syntax. Most back-end projects, notably those involving big data and Android development, employ it as their server-side language. Bhaval Patel is a Director (Operations) at Space-O Technologies. He has 20+ years of experience helping startups and enterprises with custom software solutions to drive maximum results. Under his leadership, Space-O has won the 8th GESIA annual award for being the best mobile app development company. We at Space-O Technologies have been building mobile apps for more than 10 years.

What are the Offerings of Java?

In 1949, Assembly Language was first used to simplify machine code, which was necessary for instructing computers. Every project manager should know the key factors of a language that can determine the success of app development. After going through this post, they will be able to understand the differences between Kotlin and Java and find out which one suits their requirements for developing powerful Android apps. It makes it the go-to programming language for Android app development.

Differences Between Kotlin and Java

Before an object can be cast in Java, it is mandatory to check type. This is also true in scenarios where it’s obvious to cast the object. Variables that are accessed in the body of the function are known as closures.

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