Identification Number 1.0 (Java)

import java.util.*;
import java.util.ArrayList;
import java.util.List;

public class Main
{
    public static void main(String[] args)
    {
        boolean willLoop;
        String letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; // first character of idenNum
        String tempName; // temporary storage for storing names
        List <String> name = new ArrayList<>(); // storage for storing names
        List <String> code = new ArrayList<>(); // storage for identification number
        int NPB = 8; // NUMBER of names PER BATCH, every batch of idenNum contains 9 data in ArrayList
        int batch = 0; // will increment if nth batch is full
        int NON = 0; // will use to identify NUMBER OF NAMES inside ArrayList
        char tempLet; // temporary storage for storing first character of idenNum
        String tempCode;
        do
        {
            Scanner UI = new Scanner(System.in); // Scanner object for user input
            Scanner UI1 = new Scanner(System.in); // 2nd scanner object
            willLoop = false;
            System.out.print("Complete Name: ");
            tempName = UI.nextLine();
            UI.close();

            if (NON <= NPB)
            { // will execute if the number of person is less than equal to 8 (we use 8 cause indices in array list always starts with 0)
                tempLet = letters.charAt(batch); // will use to cut the nth batch of character in "letter" variable
                tempCode = (Character.toString(tempLet)) + "-" +(NON + 1); // will use to temporarily store the nth batch of identification num
                NON++;
                name.add(tempName); // will store entered name
                code.add(tempCode); // will store identification number in name's index
            }
            if (NON == 9) // will execute if the nth batch of name is full
            {
                batch++;
                NON = 0;
            }
            String ans = "";
            System.out.print("Would you like to continue? [Y/N]: ");
            ans = UI1.nextLine();
            UI1.close();
            switch (ans)
            {
                case "Y":
                    willLoop = true;
                    break;
                case "N":
                    willLoop = false;
                    break;
            }
        }while(willLoop == true);
        System.out.println("\n\n\nOutput:");
        try
        {
            for (int i = 0; i < name.size(); i++)
            {
                System.out.println(code.get(i) + " ==> " + name.get(i));
            }
        }
        catch (IndexOutOfBoundsException iobe)
        {}
    }
}