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What is Kotlin and Why do we have to use Kotlin instead of Java?

Kotlin is a modern programming language for the JVM, actively developed by Jetbrains, cross-platform, statically typed, general-purpose programming language with type inference and officially supported as a first-class language for Android development by Google.

As per the survey of Stack Overflow Developer I 2018, Kotlin is 2nd most lovable and 4rth most wanted language in the world.

Kotlin invented at JetBrains, has been open source since 2012. The Kotlin team

are having more than 20 members  and on Github has about 100 contributors. JetBrains uses it in many products  including its flagship IntelliJ IDEA.

Here are the strongest reasons why, as an Android developer, you should start seeing this programming language as a sustainable alternative to Java:


Completely Interoperable With Java


One of the biggest conveniences with using Kotlin is that it is compatible with Java!

With the help of Kotlin tools and frameworks, It is very nice and easy to add Kotlin code to java and no need to change the entire project code in Java.

Therefore there is one saying that If you want to migrate your code of Kotlin to Java then It is like piece of cake.


More Concise Than Java

One of the biggest benefits of Kotlin over Java Android development is you are able to solve the problems using few lines of code that can only translate into a more reliable code with fewer bugs and crashes on the UX side.

This is not to mention all the other benefits that develop from code conciseness, including code that is:

Easier to maintain

Easier to read

Easier to apply changes to when needed


Safer Code

The Kotlin developers integrated into the semantics the ethics that prevent a variety of common mistakes usually happening during the program execution. It is having higher level safety compare to Java.

It allows the implementation of the same tasks with less time and effort. When the code is more simple and easy-to-understand then errors are more difficult to make and much easier to find.


Arises with a Smarter and Safer Compiler

Adding good compiler has been main goal of Kotlin development team when they created this language.

The standard library is small and tight and it consists mostly of focused extensions to the Java standard library. It leverages “Fail-Fast” principal because it detects error at compile time and not at runtime.


Easier to Maintain

Kotlin is “one-stop-language” for all application development because it supports lots of IDEs, Android Studio included.

Therefore, you are free to use tested and used development tools that you are comfortable with for maintaining your codebase


Has Null in Its Type System

Null ability issues have been one of the most common issues of Java.

In Android, the absences of certain values are to be represented as “null”. But Kotlin comes to address these issues by placing null right in its type system.