Java storing user strings and user integers (Y/A)

import java.util.ArrayList;
import java.util.Scanner;

public class Demo {
    public static void main(String[] args) {
        Scanner userIn = new Scanner(System.in);
        ArrayList<String> userStrings = new ArrayList<String>();
        ArrayList<Integer> userIntegers = new ArrayList<Integer>();
        String input;
        while (true) {
            input = userIn.nextLine();
            if (input.equals("quit")) {
                userIn.close();
                break;
            }
            try {
                userIntegers.add(Integer.parseInt(input));
            } catch (NumberFormatException e) {
                userStrings.add(input);
            }
        }
        for (Integer userInt : userIntegers) {
            System.out.print(userInt + " ");
        }
        System.out.println();
        for (String userString : userStrings) {
            System.out.print(userString + " ");
        }
    }
}