The following article explains What is Kotlin. Also, it describes how is it different from Java.

Basically, Kotlin is a modern, statically-typed programming language. It can interoperate with Java and run on the JVM, as well as on other platforms like Android, JavaScript, and Native. The following list describes how is it different from Java.

  • Null Safety. In fact, Kotlin has a strong focus on null safety, which means that the compiler enforces checks to prevent null pointer exceptions. Basically, it is a common source of bugs in Java.
  • Conciseness. It is more concise than Java. In other words, it requires lesser code to do the same tasks. This is due in part to its support for functional programming constructs like lambdas, which can greatly simplify code.
  • Interoperability. It is interoperable with Java. Hence, Kotlin code can work with Java, and it can even integrate seamlessly with existing Java libraries.
  • Extension Functions. It allows you to define extension functions, which are functions that can be called on an object as if they were part of the object’s own class. This can make code more readable and expressive.
  • Immutability: Kotlin provides built-in support for immutability, which can make code safer and easier to reason about.

Overall, Kotlin offers a modern and streamlined approach to programming that addresses many of the pain points of Java while maintaining full interoperability with Java and the Java ecosystem.

Further Reading

Constructors in Kotlin