public class Screen
{
    // display a message without a carriage return
    public void displayMessage(String message){
        System.out.print(message);
    }   // end method displayMessage

    // display a message with a carriage return
    public void displayMessageLine(String message){
        System.out.println(message);
    }   // end method displayMessageLine

    // displays a dollar amount
    public void displayDollarAmount(double amount){
        System.out.printf("$%,.2f", amount);
    }   // end method displayDollarAmount
}   // end class Screen