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  1. import java.util.regex.Pattern;
  2.  
  3. // ------------------ Custom Exception ------------------
  4. class InvalidInputException extends Exception {
  5.     public InvalidInputException(String message) {
  6.         super(message);
  7.     }
  8. }
  9.  
  10. // ------------------ Utility Class ------------------
  11. class StringValidator {
  12.  
  13.     public static boolean isEmail(String input) throws InvalidInputException {
  14.         if (input == null) throw new InvalidInputException("Email cannot be null");
  15.         assert input.length() < 500 : "Email too long";
  16.         String emailRegex = "^[\\w._%+-]+@[\\w.-]+\\.[A-Za-z]{2,6}$";
  17.         return Pattern.matches(emailRegex, input);
  18.     }
  19.  
  20.     public static boolean isPhoneNumber(String input) throws InvalidInputException {
  21.         if (input == null) throw new InvalidInputException("Phone number cannot be null");
  22.         String phoneRegex = "^\\+?[0-9]{10,15}$";
  23.         return Pattern.matches(phoneRegex, input);
  24.     }
  25.  
  26.     public static boolean isAlphanumeric(String input) throws InvalidInputException {
  27.         if (input == null) throw new InvalidInputException("Input cannot be null");
  28.         String alphaNumRegex = "^[A-Za-z0-9]+$";
  29.         return Pattern.matches(alphaNumRegex, input);
  30.     }
  31. }
  32.  
  33. // ------------------ Manual Test Runner ------------------
  34. public class Main {
  35.     private static int passed = 0;
  36.     private static int failed = 0;
  37.  
  38.     private static void runTest(String testName, boolean result) {
  39.         if (result) {
  40.             System.out.println("[PASS] " + testName);
  41.             passed++;
  42.         } else {
  43.             System.out.println("[FAIL] " + testName);
  44.             failed++;
  45.         }
  46.     }
  47.  
  48.     public static void main(String[] args) {
  49.         try {
  50.             // Email tests
  51.             runTest("Valid Email", StringValidator.isEmail("test@example.com"));
  52.             runTest("Invalid Email", !StringValidator.isEmail("invalid-email"));
  53.  
  54.             // Phone tests
  55.             runTest("Valid Phone", StringValidator.isPhoneNumber("+12345678901"));
  56.             runTest("Invalid Phone", !StringValidator.isPhoneNumber("123-abc-7890"));
  57.  
  58.             // Alphanumeric tests
  59.             runTest("Valid Alphanumeric", StringValidator.isAlphanumeric("Test123"));
  60.             runTest("Invalid Alphanumeric", !StringValidator.isAlphanumeric("Test 123"));
  61.  
  62.             // Exception tests
  63.             boolean exceptionThrown;
  64.             exceptionThrown = false;
  65.             try { StringValidator.isEmail(null); } catch (InvalidInputException e) { exceptionThrown = true; }
  66.             runTest("Email Null Exception", exceptionThrown);
  67.  
  68.             exceptionThrown = false;
  69.             try { StringValidator.isPhoneNumber(null); } catch (InvalidInputException e) { exceptionThrown = true; }
  70.             runTest("Phone Null Exception", exceptionThrown);
  71.  
  72.             exceptionThrown = false;
  73.             try { StringValidator.isAlphanumeric(null); } catch (InvalidInputException e) { exceptionThrown = true; }
  74.             runTest("Alphanumeric Null Exception", exceptionThrown);
  75.  
  76.         } catch (Exception e) {
  77.             System.out.println("Unexpected Exception: " + e.getMessage());
  78.             failed++;
  79.         }
  80.  
  81.         // Summary
  82.         System.out.println("\n--- Test Summary ---");
  83.         System.out.println("Passed: " + passed);
  84.         System.out.println("Failed: " + failed);
  85.     }
  86. }
  87.  
Success #stdin #stdout 0.17s 56148KB
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Standard input is empty
stdout
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[PASS] Valid Email
[PASS] Invalid Email
[PASS] Valid Phone
[PASS] Invalid Phone
[PASS] Valid Alphanumeric
[PASS] Invalid Alphanumeric
[PASS] Email Null Exception
[PASS] Phone Null Exception
[PASS] Alphanumeric Null Exception

--- Test Summary ---
Passed: 9
Failed: 0
https://ideone.com/rVmjF4
language:
Java (HotSpot 12)
created:
23 days ago
visibility:
public

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