what is rung here ??? i have 2 errors ?????

import java.util.Scanner;

public class Initials { public static void main (String [] args) { String firstname,lastname;

    System.out.println("Hello,what is your first name?");

    Scanner keyboard = new Scanner (System.in);
    firstname = keyboard.next();

    System.out.println("What is your last name?");

    Scanner Keyboard = new Scanner (System.in);
    lastname = keyboard.next();

    firstname.substring(0,1).toUpperCase();
    lastname.substring(2,3).toUpperCase();

    System.out.println("Your initials is");

    System.out.println(Initials = firstname + lastname);




}

}