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Code/Steiner/praxis_repetition-23-10-24/src/App.java

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+public class App {
+    public static void main(String[] args) {
+        // Customer 1
+        Customer customer1 = createCustomer("Hans", "Müller", "user1", "password123");
+        logIn(customer1, "user1", "password123");
+
+        // Customer 2
+        Customer customer2 = createCustomer("Jack", "Stone", "user2", "password456");
+        logIn(customer2, "user2", "password456");
+
+        // Retrieve names and print them
+        printCustomerNames(customer1);
+        printCustomerNames(customer2);
+    }
+
+    private static Customer createCustomer(String firstName, String lastName, String user, String password) {
+        Customer customer = new Customer(user, password);
+        customer.setForname(firstName);
+        customer.setSurname(lastName);
+        return customer;
+    }
+
+    private static void printCustomerNames(Customer customer) {
+        String[] names = retrieveNames(customer);
+        System.out.println("Customer: " + names[0] + " " + names[1]);
+    }
+
+    private static String[] retrieveNames(Customer customer) {
+        return new String[] { customer.getForname(), customer.getSurname() };
+    }
+
+    private static void logIn(Customer customer, String user, String password) {
+        if (customer.login(user, password)) {
+            System.out.println("Logged in successfully.");
+        } else {
+            System.out.println("Login failed.");
+        }
+    }
+}

Code/Steiner/praxis_repetition-23-10-24/src/Customer.java

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+public class Customer {
+    private String forname;
+    private String surname;
+    private String user;
+    private String password;
+
+    // Constructor
+    public Customer(String user, String password) {
+        this.user = user;
+        this.password = password;
+    }
+
+    // Login method: use .equals() for string comparison
+    public boolean login(String user, String pass) {
+        return this.user.equals(user) && this.password.equals(pass);
+    }
+
+    // #region Setter and Getters
+    public String getForname() {
+        return forname;
+    }
+
+    public void setForname(String forname) {
+        this.forname = forname;
+    }
+
+    public String getSurname() {
+        return surname;
+    }
+
+    public void setSurname(String surname) {
+        this.surname = surname;
+    }
+
+    public String getUser() {
+        return user;
+    }
+
+    public void setUser(String user) {
+        this.user = user;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+}