Kotlin is a functional programming language developed by the JetBrains team, which has been gaining weight since it officially became part of the Android language in 2017. This is because it compiles to JVM bytecode.
It should be noted that its use is extended to develop Backend applications. Great references in the development world such as Spring Framework, provides integration with Kotlin in its latest version, demonstrating their confidence and supporting this new programming language.
Kotlin has many features that have made more and more developers use it, but the main two are its security and interoperability.
Kotlin is safe because its design prevents certain types of errors in a program. No programming language prevents all possible errors (especially logic errors), but Kotlin does a much better job than Java. It also offers the security of "Type Safety" in applications as it is a strongly typed language (static typing, compiler checks). However, it should be mentioned that Kotlin also has the ability to try to infer types.
On the other hand, Kotlin strives to eliminate possible NullPointerException errors from the code, which is a fairly common problem in Java programs. It accomplishes this because the Kotlin typing system tracks values that can and cannot be null and prohibits operations that can lead to a NullPointerException at run time. In this way, the NullPointerException cases in Kotlin are highly reduced.
Kotlin is very easy to get started with due to its interoperability with Java on Android. Thus, the learning curve required by previously knowledgeable Java programmers is reduced. This way, you can keep existing Java code and continue to use the various Java libraries that exist for Android. This allows you to progressively add Kotlin code to your project with the possibility of interacting with the existing Java code.
You can compile an arbitrary combination of Java and Kotlin source files, regardless of how they depend on each other. You can call Java language from Kotlin, and you can call Kotlin from Java language.
Kotlin classes and methods can be called the same way that normal Java classes and methods are called. In addition, it offers maximum flexibility to mix Java and Kotlin code anywhere in the project. You can also extend Java libraries. For example, you can insert Kotkin code into a standard Java library, and thus extend it with additional functions for more convenient use in Kotlin.
Kotlin may attempt to infer the types if they are not explicitly written in the code. Unlike Java, Kotlin does not require that you specify the type of each variable because it can be inferred from the context and code included in the expression. This reduces “boilerplate” code while maintaining the security of being able to use “Type Safety” that we would expect from a modern language.
Values and variables aren't the only places type inference can be used. It can also be used in closures where the type of parameter(s) can be inferred from the signature of the function. It can also be used in single line functions where the return value can be inferred from the expression in the function.
In addition to the benefits it offers for its design as a language, also one of the main reasons that Kotlin is being used so much is the strong and open support that Google and the community of developers of android mobile applications have shown.
The Google I/O conferences of the year 2017 were also a sample of the great support that Google has towards Kotlin. In most of its videos uploaded to the Android Developers account on YouTube, it clearly shows code examples only in Kotlin. Google already announced its support for Kotlin as a first-class language for Android Development. Hyperlink InfoSystem can help you develop excellent mobile app with Kotlin.
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