import java.util.Scanner;
 
public class PasswordVerifier
{
	public static boolean isValid(String userPass)
		{
			/**
			 * This is the default stored password
			 */
 
			// Password stored by default is "cool"
 
			boolean goodSoFar = true; // Flag
			int index = 0;				  // Loop control variable
 
			// Is the string the correct length?
			if (userPass.length() != 4)
				goodSoFar = false;
 
 
			// Test to see if the characters match the password
			while (goodSoFar && index < 4)
			{
				if (!Character(userPass.charAt(index == 'c')))
					goodSoFar = false;
				index++;
				if (!Character(userPass.charAt(index == 'o')))
					goodSoFar = false;
				index++;
				if (!Character(userPass.charAt(index == 'o')))
					goodSoFar = false;
				index++;
				if (!Character(userPass.charAt(index == 'l')))
					goodSoFar = false;there 
				index++;
 
			//results are returned
			return goodSoFar;
		}
}
}

import java.util.Scanner;
 
public class PasswordDriver
{
 
public static void main(String[] args)
{
	PasswordVerifier PW = new PasswordVerifier();
	String user; // To hold a user pass
 
 
	while(user != "")
		{
			System.out.println("Please enter a password containing letters and lowercase only, or nothing to end");
			//create a scanner object
			Scanner keyboard = new Scanner(System.in);
 
			//get user pass
			user = keyboard.nextLine();
 
			//Determine if the password is valid.
			if (PW(user))
				{
					System.out.println("That is a valid password");
				}
			else
				{
					System.out.println("That is not the proper password or format");
					System.out.println("Here is an example: cool");
				}
		}
}
}