Помогите, пожалуйста
package com.javarush.task.pro.task04.task0403;
import java.util.Scanner;
public class Solution {
public static void main(String[] args) {
Scanner kb = new Scanner(System.in);
boolean isExit = false;
int sum = 0;
while (!isExit)
{
if (kb.hasNextInt())
{
int x = kb.nextInt();
sum = sum + x;
}
else if (kb.hasNextLine())
{
String s = kb.nextLine();
isExit = s.equals("ENTER");
}
System.out.println(sum);
}
}
}