Store different lines of text separately, and store text in the same row

Store different lines of text separately, and store text in the same row

public class KL {    public Map<String, ArrayList<String>> CalcuP(String path) throws IOException      {                     Map<String, ArrayList<String>> map=new HashMap<String, ArrayList<String>>();                     BufferedReader reader = new BufferedReader(new FileReader(path));          String line = null;          ArrayList<String> list = new ArrayList<String>();          while ((line = reader.readLine()) != null) {           list.add(line);          }                              reader.close();                      String list0 = list.get(0);          String list1 = list.get(1);          String list2 = list.get(2);          String list3 = list.get(3);          ArrayList<String>    splist1=new ArrayList<String>(Arrays.asList(list0.split("\t")));          ArrayList<String>    splist2=new ArrayList<String>(Arrays.asList(list1.split("\t")));          ArrayList<String>    splist3=new ArrayList<String>(Arrays.asList(list2.split("\t")));          ArrayList<String> splist4=new ArrayList<String>(Arrays.asList(list3.split("\t")));          map.put("a",splist1);          map.put("b",splist2);          map.put("c",splist3);          map.put("d",splist4);          return map;    }                                       public static void main(String[] args) throws IOException {        KL t=new KL();        String path=("filename");        Map<String, ArrayList<String>> map=t.CalcuP(path);        ArrayList<String> a = map.get("a");        ArrayList<String> b = map.get("b");        ArrayList<String> c = map.get("c");        ArrayList<String> d = map.get("d");                    }}