// A simple but very insecure login system in which
//   everyone has the same password.
//
// DEVELOPMENT NOTES:
// (These notes would not be in your program's comments. They are here
// to help you understand important topics or elements of this code.)
//
// Notice the use of the String .equals method to check for equality, the use of
//   the ! (not) operator to negate the condition, and the use of a while loop to 
//   continue prompting for a password until it is correct.
// 
// We *must* use the .equals() method here to compare Strings to see if they are
//   equivalent (contain the same characters in precisely the same order). In 
//   general, when testing objects for equivalence, we should use the .equals() 
//   method not the == operator (which works as expected for *primitive* types). 
//
// This while loop is an example of a fencepost loop because we are alternating
//   two tasks (prompting for a password and indicating the password is incorrect),
//   but will perform one of the tasks once more than the other. In this case,
//   we consider a small amount of redundancy acceptable.
import java.util.*;

public class LoginSystem {
   public static final String REAL_PASSWORD = "CSE142_Rocks!";

   public static void main(String[] args) {
      Scanner console = new Scanner(System.in);
      
      System.out.print("Enter your full name: ");
      String name = console.nextLine();
      
      System.out.println("Welcome, " + name + "!");
      System.out.print("Enter your password: ");
      String password = console.nextLine();
      
      while (!password.equalsIgnoreCase(REAL_PASSWORD)) {
         System.out.println("Incorrect passwordl! Try again...");
         System.out.print("Enter your password: ");
         password = console.nextLine();         
      }
      
      System.out.println("Access granted.");
   }
}