import java.util.*;

import java.util.stream.*;

public class MappingDemo {

    public static void main(String[] args) {

        ArrayList<Integer> al = new ArrayList<>();

        al.add(5);

        al.add(16);

        al.add(25);

        al.add(30);

        al.add(49);

        al.add(100);

        System.out.println("Actual List: " + al);

        Stream<Double> sqr = al.stream().map(n -> Math.sqrt(n));

        System.out.print("Square roots: ");

        sqr.forEach(n -> System.out.print("[" + n + "] "));

        System.out.println();

    }

}