在存储到对象数组或包含对象数组的列表中之前，如何在Java中按日期对数据进行排序？有任何线索吗？

import java.io.BufferedReader;import java.io.File;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.IOException;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;public class ReadingFile {    public static String input_path = ("D:\Aritra\inputs");    public static String output_path = ("D:\Aritra\outputs");    static BufferedReader br;    void read() {        SimpleDateFormat sdf = new SimpleDateFormat("hh:mm.ss");        SimpleDateFormat parsingSdf = new SimpleDateFormat("hh:mm.ss a");        ArrayList<Object[]> list = new ArrayList<Object[]>();        try { File fi = new File(input_path); File[] fileCount = fi.listFiles(); for (int i = 0; i < fileCount.length; i++) {     File file = fileCount[i];     if (file.isFile()) {         System.out.println("Total file count : " + fileCount.length);         String fileName = file.getName();         System.out.println("File name : " + fileName);         String data;         br = new BufferedReader(new FileReader(input_path + "\" + fileName));         while ((data = br.readLine()) != null) {  if (data.contains(">")) {      Object[] received = new Object[3];      String dat = data.substring(data.indexOf(" ") + 1, data.indexOf("-") - 1);      // System.out.println(dat);      Date date = sdf.parse(dat.substring(dat.indexOf(" "), dat.lastIndexOf(".")));      // System.out.println(date);      String timeFormat = parsingSdf.format(date);      // System.out.println(timeFormat);      received[0] = dat.substring(dat.indexOf("0"), dat.indexOf(" ") + 1) + timeFormat;      // System.out.println(received[0]);      received[1] = data.substring(data.indexOf("<") + 1, data.indexOf(",") - 1);      // System.out.println(received[1]);      received[2] = data.substring(data.indexOf("Target"), data.lastIndexOf("."));      // System.out.println(received[2]);      //list.add(received);      boolean isAdded = false;      if (!list.isEmpty()) {          Date currentEntry = new SimpleDateFormat("dd/MM/yyyy hh:mm.ss a")       .parse((String) received[0]);          int count = 0;          do {   Object[] loopElement =  list.get(count);   Date loopElementDate = new SimpleDateFormat("dd/MM/yyyy hh:mm.ss a").parse((String) loopElement[0]);   int compareResult = currentEntry.compareTo(loopElementDate);   if(compareResult<=0) {       list.add(count,received);       isAdded = true;       break;   }    count++;          } while (count < list.size());      }      if(!isAdded) {          list.add(received);      }         }         }     } }        } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace();        } catch (FileNotFoundException e) { e.printStackTrace();        } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace();        }        System.out.println("<<<<<<<<<<<<<< Result >>>>>>>>>>>>>>>>");        for(Object[] l:list) { for(Object l1:l) {     System.out.print("["+l1+"]"); } System.out.println();        }    }    public static void main(String[] args) {        new ReadingFile().read();    }}