Version1/ Implemented methods validate and registerUser

src/main/java/core/basesyntax/Main.java

@@ -0,0 +1,16 @@
+package core.basesyntax;
+
+public class Main {
+    public static void main(String[] agr) {
+        UserService userService = new UserService();
+        User bob = new User("[email protected]", "1234567890", "1234567890");
+        User alice = new User("[email protected]", "1234567890", "0987654321");
+        User mark = new User("[email protected]", "1234", "1234");
+        User marie = new User("[email protected]", "1234567890", null);
+        User[] users = new User[]{bob, alice, mark, marie};
+
+        for (User user : users) {
+            userService.registerUser(user);
+        }
+    }
+}

src/main/java/core/basesyntax/PasswordValidationException.java

@@ -1,3 +1,7 @@
 package core.basesyntax;
 
-//write your code here
+public class PasswordValidationException extends Exception {
+    public PasswordValidationException(String message) {
+        super(message);
+    }
+}

src/main/java/core/basesyntax/PasswordValidator.java

@@ -1,7 +1,11 @@
 package core.basesyntax;
 
 public class PasswordValidator {
-    public void validate(String password, String repeatPassword) {
-        //write your code here
+    public void validate(String password, String repeatPassword)
+            throws PasswordValidationException {
+
+        if (password == null || password.length() < 10 || !password.equals(repeatPassword)) {
+            throw new PasswordValidationException("Wrong passwords");
+        }
     }
 }

src/main/java/core/basesyntax/UserService.java

@@ -1,8 +1,16 @@
 package core.basesyntax;
 
 public class UserService {
+    private final PasswordValidator passwordValidator = new PasswordValidator();
+
     public void registerUser(User user) {
-        //write your code here
+        try {
+            passwordValidator.validate(user.getPassword(), user.getRepeatPassword());
+        } catch (PasswordValidationException e) {
+            System.out.println("Your passwords are incorrect. Try again.");
+            return;
+        }
+        saveUser(user);
     }
 
     public void saveUser(User user) {