5 min read

import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class UserDataStorage {

    public static void main(String[] args) {
        List<UserData> userDataList = new ArrayList<>();
        String dataFile = "./files/cargarage.csv";

        try {
            BufferedReader reader = new BufferedReader(new FileReader(dataFile));
            String line;
            while ((line = reader.readLine()) != null) {
                String[] parts = line.split(",");
                if (parts.length == 4) {
                    String name = parts[0];
                    String car1 = parts[1];
                    String car2 = parts[2];
                    String car3 = parts[3];
                    UserData userData = new UserData(name, car1, car2, car3);
                    userDataList.add(userData);
                }
            }
            reader.close();
        } catch (IOException e) {
        }

        Scanner scanner = new Scanner(System.in);

        while (true) {
            System.out.print("Please enter your name: ");
            String name = scanner.nextLine();
            System.out.print("Enter car 1: ");
            String car1 = scanner.nextLine();
            System.out.print("Enter car 2: ");
            String car2 = scanner.nextLine();
            System.out.print("Enter car 3: ");
            String car3 = scanner.nextLine();

            UserData userData = new UserData(name, car1, car2, car3);
            userDataList.add(userData);

            System.out.print("Do you want to input data for another user? (yes/no): ");
            String anotherUser = scanner.nextLine().toLowerCase();
            if (!anotherUser.equals("yes")) {
                break;
            }
        }

        // Save user data to the file
        try {
            BufferedWriter writer = new BufferedWriter(new FileWriter(dataFile));
            for (UserData userData : userDataList) {
                writer.write(userData.toString());
                writer.newLine();
            }
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

        // Print the user data
        System.out.println("User Data Table:");
        System.out.println("Name\t\tCar 1\t\tCar 2\t\tCar 3");
        for (UserData userData : userDataList) {
            System.out.println(userData);
        }
    }
}

class UserData {
    private String name;
    private String car1;
    private String car2;
    private String car3;

    public UserData(String name, String car1, String car2, String car3) {
        this.name = name;
        this.car1 = car1;
        this.car2 = car2;
        this.car3 = car3;
    }

    @Override
    public String toString() {
        return name + "," + car1 + "," + car2 + "," + car3;
    }
}

UserDataStorage.main(null)

Please enter your name: Enter car 1: Enter car 2: Enter car 3: Do you want to input data for another user? (yes/no): User Data Table:
Name		Car 1		Car 2		Car 3
Edwin,Jeep Grand Wagoneer,Lexus LC 500C,Jeep Wrangler Rubicon