Array:和为S的连续正数序列

public static ArrayList<ArrayList<Integer>> FindContinuousSequence(int sum) {
        ArrayList<ArrayList<Integer>> arrayLists = new ArrayList<ArrayList<Integer>>();
        if (sum<=0) {
            return arrayLists;
        }
        for (int i = 1; i <= sum / 2; i++) {
            int tempSum = 0;
            int big = i;
            ArrayList<Integer> arrayList = new ArrayList<Integer>();
            while (tempSum<sum) {
                tempSum+=big;
                arrayList.add(big++);
                if (tempSum==sum) {
                    arrayLists.add(arrayList);
                    break;
                }
            }
        }
        return arrayLists;
    }