[Java] In this problem you will implement a solution using the design pattern fo

Question

[Java]

In this problem you will implement a solution using the design pattern for collecting objects. We are going to model a bank. A Bank uses an ArrayList to keep track of BankAccountobjects. You will write the Bank class

The BankAccount class is provided for you. A BankAcount has a balance and a accountId.

A Bank has a constructor that takes no parameters. It needs to initialize the ArrayList used to collect bankAccounts

It has methods

add adds the specified BankAccount to the Bank

largestFirst puts the BankAccount with the largest balance first in the list. If two have the same large balance, use the first one encountered in the list

contains determines if a BankAccount with a given accountId is in the Bank. Return true is so, otherwise false

list gets an ArrayList of the BankAccount accountIds in the Bank that have balances over the specified amount.

list gets an ArrayList of the BankAccount accountIds in the Bank

Use the following files:

BankAccount.java

BankTester.java

Explanation / Answer

import java.util.*;
/*
Make sure you compile BankAccount.java first followed by Bank.java !

*/
public class Bank{
   private ArrayList<BankAccount> bankAccounts;

   // Constructor
   Bank(){
       bankAccounts = new ArrayList<BankAccount>();
   }

   public void add(BankAccount account){
       bankAccounts.add(account);
   }

   public void largestFirst(){
       if(bankAccounts.size() > 1){
           int largestIndex = -1;
           double largestBalance = -1.0;
          
           for(int i=0;i<bankAccounts.size();i+=1){
               BankAccount temp = bankAccounts.get(i);
               if(temp.getBalance() > largestBalance){
                   largestBalance = temp.getBalance();
                   largestIndex = i;
               }
           }

           if(largestIndex != 0){
               BankAccount temp = bankAccounts.get(largestIndex);
               bankAccounts.remove(largestIndex);
               bankAccounts.add(0,temp);
           }
       }
   }

   public boolean contains(String accountId){
       for(int i=0;i<bankAccounts.size();i+=1){
           String currentAccountId = (bankAccounts.get(i)).getAccountId();
           if(currentAccountId.equals(accountId)){
               return true;
           }
       }

       return false;
   }

   public ArrayList list(double thresholdAmount){
       ArrayList accountList = new ArrayList();
       for(int i=0;i<bankAccounts.size();i+=1){
           if(((bankAccounts.get(i)).getBalance()) > thresholdAmount){
               accountList.add((bankAccounts.get(i)).getAccountId());
           }
       }

       return accountList;
   }

   public ArrayList list(){
       ArrayList accountList = new ArrayList();
       for(int i=0;i<bankAccounts.size();i+=1){
           accountList.add((bankAccounts.get(i)).getAccountId());
       }

       return accountList;
   }
}

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