Deck Of Cards

import java.util.*;

public class DeckOfCards {
    public static void main(String[] args) {
        Scanner myScan = new Scanner(System.in);
        ArrayList<String> vehicles = new ArrayList<>(Arrays.asList(myScan.nextLine().split(", ")));
        int n = Integer.parseInt(myScan.nextLine());
        for (int i = 1; i <= n; i++) {
            String[] tokens = myScan.nextLine().split(", ");
            String command = tokens[0];
            String cardName = tokens[1];
            int cardIndex = -1;
            String newCard = "";
            if (tokens.length == 3) {
                newCard = tokens[2];
            }
            switch (command) {
                case "Add":
                    addCard(vehicles, cardName);
                    break;
                case "Remove":
                    removeCard(vehicles, cardName);
                    break;
                case "Remove At":
                    cardIndex = Integer.parseInt(cardName);
                    removeCardAt(vehicles, cardIndex);
                    break;
                case "Insert":
                    cardIndex = Integer.parseInt(cardName);
                    if (cardIndex < 0 || cardIndex >= vehicles.size()) {
                        System.out.println("Index out of range");
                    } else {
                        insertCard(vehicles, cardIndex, newCard);
                    }
                    break;
            }
        }
        String joined = String.join(", ", vehicles);
        System.out.println(joined);
    }

    private static void insertCard(ArrayList<String> vehicles, int cardIndex, String newCard) {
        if (vehicles.contains(newCard)) {
            System.out.println("Card is already bought");
        } else {
            System.out.println("Card successfully bought");
            vehicles.add(cardIndex, newCard);
        }
    }

    private static void removeCardAt(ArrayList<String> vehicles, int cardIndex) {
        if (cardIndex > -1 && cardIndex < vehicles.size()) {
            System.out.println("Card successfully sold");
            vehicles.remove(cardIndex);
        } else {
            System.out.println("Index out of range");
        }
    }

    private static void removeCard(ArrayList<String> vehicles, String cardName) {
        if (!vehicles.contains(cardName)) {
            System.out.println("Card not found");
        } else {
            System.out.println("Card successfully sold");
            vehicles.remove(cardName);
        }
    }

    private static void addCard(ArrayList<String> vehicles, String cardName) {
        if (vehicles.contains(cardName)) {
            System.out.println("Card is already bought");
        } else {
            System.out.println("Card successfully bought");
            vehicles.add(cardName);
        }
    }

}