Kotlin for Enterprise Applications using Java EE

Compiling and running

Now that we have JDK and the Kotlin compiler set up, let's try writing our first program in Kotlin and learn a few different ways to compile and run it.

Let's consider the HelloWorld.kt program, which just prints the hello message and the first argument passed to it:

fun main(args:Array<String>){    println("Hello${args[0]}")}

There are different ways to compile and run Kotlin code:

• Command line: By including the runtime, we don't have to provide the classpath; it gets bundled into it. To bundle the JAR, execute the following command in the command prompt/console:

kotlinc HelloWorld.kt -include-runtime -d HelloWorld.jar

We pass the class name and include the runtime and the name of the JAR as command-line arguments.