StringTask4.java

import java.util.Scanner;


    public class StringTask4 {

        public static void main(String[] args) {
            Scanner scanner = new Scanner(System.in);

            System.out.print("Enter a password: ");
            String enteredPassword = scanner.nextLine();

            int passwordLength = enteredPassword.length();
            boolean passwordLengthIsValid = passwordLength >= 8 && passwordLength <= 15;
            boolean passwordStartsWithLetter = (enteredPassword.charAt(0) >= 'a' && enteredPassword.charAt(0) <= 'z') ||
                    (enteredPassword.charAt(0) >= 'A' && enteredPassword.charAt(0) <= 'Z');
            boolean passwordContainsUppercase = false;
            boolean passwordContainsNumber = false;

            for (int currentIndex = 0; currentIndex < passwordLength; currentIndex++) {
                char currentCharacter = enteredPassword.charAt(currentIndex);

                if (currentCharacter >= 'A' && currentCharacter <= 'Z') {
                    passwordContainsUppercase = true;
                }

                if (currentCharacter >= '0' && currentCharacter <= '9') {
                    passwordContainsNumber = true;
                }
            }

            System.out.println("Length between 8 and 15:    " + (passwordLengthIsValid      ? "PASS" : "FAIL"));
            System.out.println("Starts with a letter:       " + (passwordStartsWithLetter   ? "PASS" : "FAIL"));
            System.out.println("Contains uppercase letter:  " + (passwordContainsUppercase  ? "PASS" : "FAIL"));
            System.out.println("Contains a number:          " + (passwordContainsNumber     ? "PASS" : "FAIL"));

            if (passwordLengthIsValid && passwordStartsWithLetter && passwordContainsUppercase && passwordContainsNumber) {
                System.out.println("\nPassword is VALID.");
            } else {
                System.out.println("\nPassword is INVALID.");
            }


        }
    }