How to run a scala program in terminal on mac?

Question

I built an object which is supposed to serialize and deserialize a file. I built it in scala in terminal on mac. I'm new to scala and don't have that much programming experience in general. I was wondering how I could run the object so that it performs the task I assigned it to do. Might be a dumb question but I don't know what to do. Here's an image of what my object is

Answer 1

Enter in terminal (repl)

serializationTest3.main(Array())

"Running" an object is actually executing the method main(Array[String]): Unit of the object.

Extending trait App

object X extends App {
  foo()
}

is like wrapping the object body with method main

object X {
  def main(args: Array[String]): Unit = {
    foo()
  }
}

https://www.scala-lang.org/api/2.13.3/scala/App.html

How Scala App trait and main works internally?

Difference between object with main() and extends App in scala

Difference between using App trait and main method in scala