如何用Java初始化List<List<Integer>>?我知道List是一个接口,我可以使用ArrayList或LinkedList来实现List<Integer> list = new ArrayList<Integer>(),但是当我初始化List<List<Integer>> list = new ArrayList<ArrayL
//implementing constructor and destructor node * head = NULL;list::~list(){to null and set node->next to null 大体上 list My_list; int i = 0;move depends on uninitialised valu