Count of 1 in a sorted binary array GFG

 package com.company;

public class Count1S {
    //    Counting the number of 1 in binary sorted array
    public static int getCount(int[] arr) {
        int n = arr.length;
        int first = countOccurrence.firstIndex(arr, 1);
        if (first == -1) {
            return 0;
        }
        return (n  - first) ;
    }

    public static void main(String[] args) {
        int[] array = {0, 0, 0, 1, 1, 1, 1};
        System.out.println(getCount(array));
    }
}