Fundamentals Mid-Exams Wizard Poker

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

public class WizardPoker {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        List<String> cards = getList(scanner);
        List<String> changeDeck = new ArrayList<>();

        String deckChange = scanner.nextLine();
        while (!"Ready".equals(deckChange)) {
            String[] tokens = deckChange.split("\\s+");
            String command = tokens[0];
            String cardName = tokens[1];

            switch (command) {
                case "Add":
                    if (cards.contains(cardName)) {
                        changeDeck.add(cardName);
                    } else {
                        System.out.println("Card not found.");
                    }
                    break;
                case "Insert":
                    int index = Integer.parseInt(tokens[2]);
                    if ((index >= 0 && index < changeDeck.size()) && cards.contains(cardName)) {
                        changeDeck.add(index, cardName);
                    } else {
                        System.out.println("Error!");
                    }
                    break;
                case "Remove":
                    if (changeDeck.contains(cardName)) {
                        changeDeck.remove(cardName);
                    } else {
                        System.out.println("Card not found.");
                    }
                    break;
                case "Swap":
                    String secondCard = tokens[2];
                    String firstCard = tokens[1];
                    int indexFirst = changeDeck.indexOf(cardName);
                    int indexSecond = changeDeck.indexOf(secondCard);
                    changeDeck.set(indexFirst, secondCard);
                    changeDeck.set(indexSecond, firstCard);
                    break;
                case "Shuffle":
                    Collections.reverse(changeDeck);
                    break;
            }
            deckChange = scanner.nextLine();
        }
        for (String currentChange : changeDeck) {
            System.out.print(currentChange + " ");
        }


    }

    private static List<String> getList(Scanner scanner) {
        String[] items = scanner.nextLine().split(":+");
        List<String> input = new ArrayList<>();

        Collections.addAll(input, items);
        return input;
    }
}