public static void kSum(List<Integer> numbers, int target) {         int len = numbers.size();         for (int i = 0; i < len; i++) {             if (numbers.get(i) < target) {                 kSum(numbers, i, target - numbers.get(i));             }         }     }     public static void kSum(List<Integer> numbers, int start, int target) {         int sum = 0;         for (int j = start + 1; j < numbers.size(); j++) {             if (sum + numbers.get(j) == target) {                 count++;             } else if (sum + numbers.get(j) < target) {                 sum += numbers.get(j);                 kSum(numbers, j, target);             }          }     }