String pathname = "F:\\Calibration.txt";try (FileReader reader = new FileReader(pathname);    BufferedReader br = new BufferedReader(reader)) {        String line;        while ((line = br.readLine()) != null) {            String[] split = line.split(",");            System.out.println(split[0]);        }此代碼可以獲取第一列的內(nèi)容，但列不固定。我想 - 按列數(shù)自動獲取每列的數(shù)據(jù)不使用像這樣的修復(fù)數(shù)字 split[fixNumber]27311,28841,30577,31583,026401,28046,30234,31255,5025495,27263,29891,30926,10024594,26494,29548,30597,15023696,25737,29206,30269,200這是 Calibration.txt 的內(nèi)容預(yù)期輸出：27311 26401 25495 24594 23696colmun 不固定，我不想使用 split[0] 或 (split[1] split[2]...)這是我的新代碼：  List<String> list = new ArrayList();  String pathname = "F:\\Calibration.txt";  try (FileReader reader = new FileReader(pathname);    BufferedReader br = new BufferedReader(reader)) {        String line;        while ((line = br.readLine()) != null) {            list.add(line);       }       for(int i = 0; i < list.size(); i++) {           System.out.println(i);                for(String a : list){                    String[] regex = a.split(",");                    System.err.println(regex[i]);                }            }