VPR-Projekt/src/Execute.java

import java.util.ArrayList;
import java.util.Scanner;

/**
 * The class Execute is the execution file for the whole program.
 */
public class Execute {
    public static void main(String[] args) {
        Data datei = new Data("users.txt");
        ArrayList<User> user = datei.readData();

        for (User user1 : user) {
            System.out.println(user1);
        }
        System.out.println();
        System.out.println("\t\t\tANMELDUNG");
        int i = 0;
        Scanner leser = new Scanner(System.in);

        while (true) {


            System.out.print("Name: ");
            boolean error = false;
            String name = leser.nextLine();
            error = isError(error, name);
            System.out.print("Passwort: ");
            String password = leser.nextLine();
            error = isError(error, password);


            for (User user1 : user) {
                if (!error) {
                    if (user1.getPassword().equals(password) && user1.getPhonenumber().equals(name)) {
                        System.out.println();
                        System.out.println("Herzlich Willkommen " + user1.getNameParent1() + " und " + user1.getNameParent2() + ", Ihr Login war erfolgreich!");
                        i++;
                        break;

                    } else if (!(user1.getPassword().equals(password) && user1.getPhonenumber().equals(name))) {
                        System.out.println("Login fehlgeschlagen. Versuchen Sie es erneut.");
                        break;
                    }

                }else{
                    System.out.println("Bitte Anmeldedaten angeben.");
                    break;
                }
            }
            if (i > 0) {
                break;
            }
        }
    }

    private static boolean isError(boolean error, String name) {
        if (name.isEmpty()) {
            error = true;
        }
        return error;
    }
}