Array Modifier [Java]

package svephoto.company;

import java.util.*;
import java.util.stream.Collectors;

public class ArrayModifier2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        List<Integer> elements = Arrays.stream(scanner.nextLine().split("\\s+"))
                .map(Integer::parseInt).collect(Collectors.toList());

        String command;

        while (!"end".equals(command = scanner.nextLine())) {
            String[] tokens = command.split("\\s+");

            if ("decrease".equals(tokens[0])) {
                for (int i = 0; i < elements.size(); i++) {
                    int currentElementValue = elements.get(i) - 1;
                    elements.set(i, currentElementValue);
                }
            }

            if ("swap".equals(tokens[0])) {
                Collections.swap(elements, Integer.parseInt(tokens[1]), Integer.parseInt(tokens[2]));
            }

            if ("multiply".equals(tokens[0])) {
                int multiplication = elements.get(Integer.parseInt(tokens[1])) * elements.get(Integer.parseInt(tokens[2]));
                elements.set(Integer.parseInt(tokens[1]), multiplication);
            }
        }

        System.out.println(formatListOfIntegers(elements));
    }

    private static String formatListOfIntegers(List<Integer> integerList) {
        return integerList.stream()
                .map(String::valueOf)
                .collect(Collectors.joining(", "));
    }
}