Getting a 'char cannot be dereferenced error' when compiling code using .toUpperCase();

Question

im new to java and am writing a program that will let you input your first and last name and will give you your initials, but i want the intitials to always be in upper case.

I get a "char cannot be dereferenced" error whenever i run the code.

    import java.util.*;

    public class InitialHere
    {
        public static void main (String[] args)
        {
            Scanner getInput = new Scanner (System.in);
            String firstName;
            String lastName;
            char firstInitial;
            char lastInitial;

            System.out.println("What is your first name?");
            System.out.println();
            firstName = getInput.nextLine();
            System.out.println();
            System.out.println("Thankyou, what is your last name?");
            System.out.println();
            lastName = getInput.nextLine();

            firstInitial = firstName.charAt(0);
            lastInitial = lastName.charAt(0);
            firstInitial = firstInitial.toUpperCase();
            lastInitial = lastInitial.toUpperCase();

            System.out.println();
            System.out.println("Your initials are " + firstInitial + "" + lastInitial + ".");

        }
    }

Answer 1

In Java, primitives have no methods, only their boxed types do. If you want to get the uppercase version of a char, the Character class has a method just for that: Character.toUpperCase:

 firstInitial = Character.toUpperCase(firstInitial);

(Do the same for lastInitial)