Test sum

Sum.java

package com.javarush.task.task04.task0442;

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Solution {
    public static void main(String[] args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        int sum = 0;
        int number = 0;
        while (number != -1) {
            number = Integer.parseInt(reader.readLine());
            sum = sum + number;
        }
        System.out.println(sum);
    }
}