Keep getting the following error:
Exception in thread "main" java.lang.NullPointerException
at java.base/jdk.internal.math.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1838)
at java.base/jdk.internal.math.FloatingDecimal.parseDouble(FloatingDecimal.java:110)
at java.base/java.lang.Double.parseDouble(Double.java:543)
at Solution.main(Solution.java:17)
package com.codegym.task.task05.task0507;
/*
Arithmetic mean
*/
import java.io.*;
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader BR = new BufferedReader(new InputStreamReader(System.in));
double enterednumbers =0;
double sum =0;
double totalsum = sum/enterednumbers;
while (true) {
double a=Double.parseDouble(BR.readLine());
enterednumbers++;
sum+=a;
if (a == -1)
break;
}System.out.println(totalsum);
}
}