Main method in Scala

Question

I wrote a Scala class and defined the main() method in it. It compiled, but when I ran it, I got NoSuchMethodError:main. In all the scala examples

Answer 1

When I want to test my code in intelligent idea scala editor, I simply create a companion object just below my class and put a main method in it. That's all. see an example:

class Colon {
    class Cow {
        def ^ (moon:Moon): Unit ={
        println("Cow jumped over the moon")
        }
    }
    class Moon{
        def ^:(cow:Cow) = println("This cow jumped over moon too")
    }
}
object Colon{
    def main(args: Array[String]): Unit = {
    val c:Colon = new Colon
    val cow = new c.Cow
    val moon = new c.Moon
    cow ^ moon
    cow ^: moon
    moon.^:(cow)
    }
}