import java.io.*;
import java.util.*;

/*
* AccountUtility class
*/
public class AccountUtility {

// Field to store list numbers in ArrayList
private ArrayList<String> listNumbers;
// Field to store accounts in LinkedHashMap
private LinkedHashMap<String, Account> mapNumAccounts;

// Constructor to instantiate AccountUtility object
public AccountUtility() {
   listNumbers = new ArrayList<>();
   mapNumAccounts = new LinkedHashMap<>();
}

// Method to read accounts.txt file and populate field variables
public void readFile() {
   try {
         listNumbers.clear();
         mapNumAccounts.clear();

         // Construct Scanner object
         Scanner scanner = new Scanner(new File("accounts.txt"));

         // While loop: read file line by line
         while (scanner.hasNext()) {
            String next = scanner.nextLine();

            // Split each line by "<>" token
            String[] sp = next.split("<>");

            // Construct String of account number
            String number = sp[0];
            // Construct CheckingAccount corresponding to line
            CheckingAccount ca
                     = new CheckingAccount(Integer.parseInt(number),
                           sp[1], sp[2],
                           Double.parseDouble(sp[3]));

            // Add account number to listNumbers ArrayList
            listNumbers.add(number);

            // Add CheckingAccount to LinkedHashMap
            mapNumAccounts.put(number, ca);
         }

         // close Scanner object
         scanner.close();
   } catch (FileNotFoundException

Please create two questions with answers about sorting algorithms....