Fundamentals Mid-Exams Weaponsmith

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

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

        List<String> parts = Arrays.stream(scanner.nextLine().split("\\|"))
                .collect(Collectors.toList());
        String command = scanner.nextLine();
        while (!"Done".equals(command)) {
            String[] tokens = command.split("\\s+");
            switch (tokens[1]) {
                case "Left":
                    int index = Integer.parseInt(tokens[2]);
                    if (index < parts.size() && index >= 1) {
                        Collections.swap(parts, index, index - 1);
                    }
                    break;
                case "Right":
                    int index1 = Integer.parseInt(tokens[2]);
                    if (index1 < parts.size() - 1 && index1 >= 0) {
                        Collections.swap(parts, index1, index1 + 1);
                    }
                    break;
                case "Even":
                    List<String> even = new ArrayList<>();
                    for (int i = 0; i < parts.size(); i += 2) {
                        even.add(parts.get(i));
                    }
                    System.out.println(String.join(" ", even));
                    break;
                case "Odd":
                    List<String> odd = new ArrayList<>();
                    for (int i = 1; i < parts.size(); i += 2) {
                        odd.add(parts.get(i));
                    }
                    System.out.println(String.join(" ", odd));
                    break;
            }
            command = scanner.nextLine();
        }
        System.out.println("You crafted " + String.join("", parts) + "!");
    }
}