字符串Java StringTokenizer，空空空标记

Question

我正在尝试将一个字符串拆分为29个标记。。。。。stringtokenizer不会返回空标记。我试了试绳子。分开，但我相信我做错了什么：

String [] strings = line.split(",", 29);

样本输入：

10150,15:58,23:58,16:00,00:00,15:55,23:55,15:58,00:01,16:03,23:58,,,,,16:00,23:22,15:54,00:03,15:59,23:56,16:05,23:59,15:55,00:01,,,,
10155,,,,,,,,,,,07:30,13:27,07:25,13:45,,,,,,,,,,,07:13,14:37,08:01,15:23
10160,10:00,16:02,09:55,16:03,10:06,15:58,09:48,16:07,09:55,16:00,,,,,09:49,15:38,10:02,16:04,10:00,16:00,09:58,16:01,09:57,15:58,,,,