List按所需数量分组

int n = source.size/count + 1;
public static <T> List<List<T>> averageAssign(List<T> source, int n) {
     
        List<List<T>> result = new ArrayList<List<T>>();
        int remainder = source.size() % n;  //(先计算出余数)
        int number = source.size() / n;  //然后是商
        int offset = 0;//偏移量
        for (int i = 0; i < n; i++) {
     
            List<T> value = null;
            if (remainder > 0) {
     
                value = source.subList(i * number + offset, (i + 1) * number + offset + 1);
                remainder--;
                offset++;
            } else {
     
                value = source.subList(i * number + offset, (i + 1) * number + offset);
            }
            result.add(value);
        }
        return result;
    }