Creating and running a first application

::echo before %JAVA_OPTS%
set JAVA_OPTS=
::echo after %JAVA_OPTS%
rem  set _BIN_DIR=
rem  for %%i in (%~sf0) do set _BIN_DIR=%_BIN_DIR%%%~dpsi
rem  set _KOTLIN_HOME=%_BIN_DIR%..
  set _BIN_DIR=O:\4Lrn\Kotlin\kotlinc_1.1.51\bin\
  set _KOTLIN_HOME=O:\4Lrn\Kotlin\kotlinc_1.1.51
  set JAVA_HOME=D:\Program Files (x86)\Java\jdk1.8.0_20

 

 

Creating and running a first application

Create a simple application in Kotlin that displays Hello, World!. Using our favorite editor, we create a new file called hello.kt with the following:

fun main(args: Array<String>) {
    println("Hello, World!")
}
Compile the application using the Kotlin compiler

$ kotlinc hello.kt -include-runtime -d hello.jar
The -d option indicates what we want the output of the compiler to be called and may be either a directory name for class files or a .jar file name. The -include-runtime option makes the resulting .jar file self-contained and runnable by including the Kotlin runtime library in it. If you want to see all available options run

$ kotlinc -help
Run the application.

$ java -jar hello.jar