SquareOfNumberCalculator.java

package de.oliver;

import javaslang.collection.List;

public class SquareOfNumberCalculator {
  public static void main(String[] args) {
    final List<Integer> myList = List.range(1, 6);
    final List<Integer> squaredNumbers = myList.map(i -> i * i);
    System.out.println("Printing original numbers");
    myList.forEach(i -> System.out.println(" i --> " + i));
    System.out.println("Printing squared numbers");
    squaredNumbers.forEach(i -> System.out.println(" i --> " + i));
  }
}

As a reaction to https://hyarlagadda.github.io/2017-01-03-Why-you-should-switch-to-Scala-from-Java/