subarray sum

public static void main(String[] args) {        // TODO Auto-generated method stub        int[] array1 = { 2, 3, 3, 5, 6 };        int[] res = getSubarraySum(array1, 8);        for (int i : res) {            System.out.print(i + " ");        }        System.out.println();        int[] array2 = { 2, -3, 3, 5, 6 };        res = getSubarraySum(array2, 8);        for (int i : res) {            System.out.print(i + " ");        }    }    private static int[] getSubarraySum(int[] array, int target) {        int[] res = new int[2];        if (array == null || array.length == 0) {            return res;        }        Map<Integer/*subsum*/, Integer/*index of array*/> map = new HashMap<>();        map.put(0, -1);        int sum = 0;        for (int i = 0; i < array.length; i++) {            sum = sum + array[i];            map.put(sum, i);            if (map.containsKey(sum - target)) {                res[0] = map.get(sum - target) + 1;                res[1] = i;                return res;            }        }        return res;    }