Searching in an array with custom comparator in java

Question

Why does it always return 49999 no matter what strToSearch variable holds? Even with the clank search variable it returns the same. Have I missed s

Answer 1

Problem is in your binarysearch's comparator method. It should be re-written like this:

System.out.println(Arrays.binarySearch(arr, strToSearch, new Comparator() {
    @Override
    public int compare(String o1, String o2) {
        if(o1 != null && o2 != null && !o1.isEmpty() && !o2.isEmpty() && o1.indexOf(",") != -1) {
            String[] o1Arr = o1.split(",");
            int i1 = Integer.parseInt(o2);
            int i2 = Integer.parseInt(o1Arr[0]);
            return i2-i1;
        }
        return 0;
    }
}));