Need help with simple program

Question

I believe that I have everything right except when I get down to the else I want it to return to the while loop. Is there a better way of doing this because it doesn't work for me. Here is the program:
public class ABCInput
     public static void main(String[] args) throws Exception
          char response;
          System.out.println("Please type a A,B,C to receive a message or a Q to quit");
          response = (char)System.in.read();System.in.read();System.in.read();
          while(response == 'A' || response == 'B' || response == 'C')
               System.out.println("\"Good Job\"\n\n");
               System.out.println("Please type a A,B,C to receive a message or a Q to quit");
               response = (char)System.in.read();System.in.read();System.in.read();
          if(response == 'Q')
               System.out.println("Thanks for playing");
               System.exit(0);
          else
               System.out.println("You have entered an invalid letter. Please try again");
               response = (char)System.in.read();System.in.read();System.in.read();
}

Answer 1

mahugl,
Try this out.
public class ABCInput
     public static void main(String[] args) throws Exception
          char response;
          boolean notInvalid = true;
          boolean notFinished = true;
          System.out.println("Please type a A,B,C to receive a message or a Q to quit");
          response = (char)System.in.read();System.in.read();System.in.read();
          while(notFinished == true)
               while(notInvalid == true)
                    if(response == 'A' || response == 'B' || response == 'C' || response == 'Q' || response == 'a' || response == 'b' || response == 'c' || response == 'q')
                         notInvalid = false;
                    else
                         System.out.println("You have entered an invalid letter. Please try again");
                         response = (char)System.in.read();System.in.read();System.in.read();
               if(response == 'Q' || response == 'q')
                    notFinished = false;
               else
                    System.out.println("\"Good Job\"\n\n");
                    System.out.println("Please type a A,B,C to receive a message or a Q to quit");
                    response = (char)System.in.read();System.in.read();System.in.read();
                    notInvalid = true;
          System.out.println("Thanks for playing");
          System.exit(0);
}jerryrika