added low difficulty exception handling practice problem

Author: ARajan1084

src/com/codefortomorrow/advanced/chapter14/practice/account/InvalidAgeException.java

@@ -0,0 +1,4 @@
+package com.codefortomorrow.advanced.chapter14.practice.account;
+
+public class InvalidAgeException {
+}

src/com/codefortomorrow/advanced/chapter14/practice/account/InvalidPasswordException.java

@@ -0,0 +1,4 @@
+package com.codefortomorrow.advanced.chapter14.practice.account;
+
+public class InvalidPasswordException {
+}

src/com/codefortomorrow/advanced/chapter14/practice/account/InvalidUsernameException.java

@@ -0,0 +1,4 @@
+package com.codefortomorrow.advanced.chapter14.practice.account;
+
+public class InvalidUsernameException {
+}

src/com/codefortomorrow/advanced/chapter14/practice/account/Main.java

@@ -0,0 +1,31 @@
+package com.codefortomorrow.advanced.chapter14.practice.account;
+
+import java.util.Scanner;
+
+public class Main {
+    public static void main(String[]args) {
+        Scanner sc = new Scanner(System.in);
+
+        System.out.println("Welcome to Account Creation!");
+        while (true) {
+            System.out.print("Enter username (4 to 10 characters): ");
+            String username = sc.next();
+            System.out.print("Enter age: ");
+            int age = sc.nextInt();
+            System.out.print("Enter password (4 to 10 characters): ");
+            String password = sc.next();
+            System.out.print("Confirm password (4 to 10 characters): ");
+            String confirmPassword = sc.next();
+
+            // TODO: try and catch to handle exceptions
+            createAccount(username, password, age, confirmPassword);
+            System.out.println("Account created successfully!");
+        }
+
+    }
+
+    public static void createAccount(String username, String password, int age, String confirmPassword) throws
+            InvalidAgeException, InvalidPasswordException, InvalidUsernameException, PasswordMismatchException {
+        // TODO: complete
+    }
+}

src/com/codefortomorrow/advanced/chapter14/practice/account/PasswordMismatchException.java

@@ -0,0 +1,4 @@
+package com.codefortomorrow.advanced.chapter14.practice.account;
+
+public class PasswordMismatchException {
+}

src/com/codefortomorrow/advanced/chapter14/solutions/account/InvalidAgeException.java

@@ -0,0 +1,4 @@
+package com.codefortomorrow.advanced.chapter14.solutions.account;
+
+public class InvalidAgeException extends Exception{
+}

src/com/codefortomorrow/advanced/chapter14/solutions/account/InvalidPasswordException.java

@@ -0,0 +1,4 @@
+package com.codefortomorrow.advanced.chapter14.solutions.account;
+
+public class InvalidPasswordException extends Exception {
+}

src/com/codefortomorrow/advanced/chapter14/solutions/account/InvalidUsernameException.java

@@ -0,0 +1,4 @@
+package com.codefortomorrow.advanced.chapter14.solutions.account;
+
+public class InvalidUsernameException extends Exception {
+}

src/com/codefortomorrow/advanced/chapter14/solutions/account/Main.java

@@ -0,0 +1,52 @@
+package com.codefortomorrow.advanced.chapter14.solutions.account;
+
+import java.util.Scanner;
+
+public class Main {
+    public static void main(String[]args) {
+        Scanner sc = new Scanner(System.in);
+
+        System.out.println("Welcome to Account Creation!");
+        while (true) {
+            System.out.print("Enter username (4 to 10 characters): ");
+            String username = sc.next();
+            System.out.print("Enter age: ");
+            int age = sc.nextInt();
+            System.out.print("Enter password (4 to 10 characters): ");
+            String password = sc.next();
+            System.out.print("Confirm password (4 to 10 characters): ");
+            String confirmPassword = sc.next();
+
+            try {
+                createAccount(username, password, age, confirmPassword);
+                System.out.println("Account created successfully!");
+                break;
+            } catch (InvalidUsernameException e) {
+                System.out.println("Invalid username.");
+            } catch (InvalidPasswordException e) {
+                System.out.println("Invalid password.");
+            } catch (InvalidAgeException e) {
+                System.out.println("Must be 18 or older to create an account.");
+            } catch (PasswordMismatchException e) {
+                System.out.println("Passwords don't match!");
+            }
+        }
+
+    }
+
+    public static void createAccount(String username, String password, int age, String confirmPassword) throws
+            InvalidAgeException, InvalidPasswordException, InvalidUsernameException, PasswordMismatchException {
+        if (username.length() < 4 || username.length() > 10) {
+            throw new InvalidUsernameException();
+        }
+        if (password.length() < 4 || password.length() > 10) {
+            throw new InvalidPasswordException();
+        }
+        if (age < 18) {
+            throw new InvalidAgeException();
+        }
+        if (!password.equals(confirmPassword)) {
+            throw new PasswordMismatchException();
+        }
+    }
+}

src/com/codefortomorrow/advanced/chapter14/solutions/account/PasswordMismatchException.java

@@ -0,0 +1,4 @@
+package com.codefortomorrow.advanced.chapter14.solutions.account;
+
+public class PasswordMismatchException extends Exception {
+}