If you don’t know Kotlin, it’s a relatively new programming language that makes programming on Android and Java easy. Earlier, I have shared the best free Kotlin courses and Android development courses and in this article, I am going to share best Kotlin courses for Java and Android developers. Secondary constructor works, like in Java, without any difference.Hello guys, if you want to learn Kotlin and looking for the best resources like online courses then you have come to the right place. In Java, when we need to check variable for null, we usually write block. It’s time to tell you how null-safety in Kotlin works. Kotlin also allows you to declare immutable objects with keyword ‘val’. Var implicitName = 'Kotlin' // In that case we declare a variable implicitly

var explicitName : String = 'Kotlin' // Here we declare the type

Let’s see how the declaration of variables looks. Starting to develop an Android application on Kotlin is not very difficult.

Many of these features have appeared only in the latest versions of Java but were implemented by Kotlin creators. They provided a solution of so-called ‘one billion problem’: null by default. Kotlin creators wanted to invent null-safety language that could be more flexible and friendlier than Java. These guys dreamed about removing those restrictions which are imposed on developers in Java 6: no streams, no lambda functions, no try-with-resources and etc. Why Kotlin was created and by whomĬreating of language began in 2010 at JetBrains by two talented programmers – Andrew Breslav and Dmitry Zhemerov. Let’s look at the history of that language, sort out the pros and cons of the language, as well as a look at an example and how you can start using Kotlin for Android development. It is a modern, statically-typed language aimed at trying to make the code simpler and clearer for everyone and bring long-awaited Java features to Android developers. Some people seriously considered it as a full-fledged replacement of Java in Android development. Kotlin programming language now on everyone’s lips.

Android development with kotlin