ArrayList Descending Order

package com.zazospackage;

import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        ArrayList<Integer> numbers = new ArrayList<>();
        int number;
        System.out.println("Welcome to the sorting program, enter the numbers you wish to be sorted.");
        System.out.println("Type -1 to stop entering numbers.");
        do{
            System.out.print("Number: ");
            number = input.nextInt();
            numbers.add(number);
        }while(number != -1);
        Collections.sort(numbers, Collections.reverseOrder());
        for(int i=0; i < numbers.size(); i++){
            if(numbers.get(i) == -1){
                numbers.remove(i);
            }
            else {
                System.out.println(numbers.get(i));
            }
        }
    }
}