How do I find the largest negative value in an array with both positive and negative values?

Question

I need to return the greatest negative value, and if there are no negative values, I need to return zero. Here is what I have:

public int greatestNegative(int[]          


        

Answer 1

If you need the greatest negative number then sort array thin search for first negative number

import java.util.Arrays;

class Main {

    public static void main(String[] args) {
        int arr[] = { 2, 4, 1, 7,2,-3,5,-20,-4,5,-9};
        System.out.println(greatestNegative(arr));
    }

    private static int greatestNegative(int[] arr) {
        Arrays.sort(arr);
        for (int i = arr.length - 1; i >= 0; i--) {
            if (isNegative (arr[i])) {
                return arr[i];
            }
        }
        return 0;
    }

    private static boolean isNegative (int i) {
        return i < 0;
    }
}

Output : -3