Have to create java program account management program using a MVC pattern.I kin

Question

Have to create java program account management program using a MVC pattern.I kind of stuck it to do coding it. system suppose to ask me amount of deposit and widraw, and then I suppose to enter the amount of deposit and widraw money and updated it .

supposed print out id, name,updated balance.also make transfer option that balance transfer euro or yuan .I have to evaluate 6 people. but i dont have idea to evaluate multiple people account. please help me ~

MODEL

package account.model;

public class AccountModel {

   private final double euro = 0.72;
   private final double yuan = 6.2;
   private String id;
   private String name;
   private double balance;

   public AccountModel(String id, String name, double balance) {
   super();
   this.id = id;
   this.name = name;
   this.balance = balance;
   }

   public String getId() {
   return id;
   }

   public void setId(String id) {
   this.id = id;
   }

   public String getName() {
   return name;
   }

   public void setName(String name) {
   this.name = name;
   }

   public double deposit(double amount)
   {
   balance= balance+amount;
   return balance;
   }
   public double withdraw(double amount)
   {
   balance= balance-amount;
   return balance;
   }
   public double editin_euro()
   {
   balance = balance * euro;
   return balance;
  
   }
   public double editin_yuan()
   {
   balance = balance / yuan;
   return balance;
   }
   public double getBalance()
   {
   return balance;
   }
   }

VIew

package account.model;

public class AccountView {

       public void Accountview(String id,String name, Double money) {
       System.out.println("ID: "+ id);
       System.out.println("Name: " + name);
       System.out.println("Balance: " + money);
       }
}

Control

package account.model;

public class AccountController {
   private AccountModel model;
   private AccountView view;
  
   public AccountController(AccountModel model, AccountView view) {
   this.model = model;
   this.view = view;
   }
  
   public void setaccountName(String name) {
   model.setName(name);
   }
  
   public String getaccountName() {
   return model.getName();
   }
  
   public void setaccountid(String id) {
   model.setId(id);
   }
  
   public String id() {
   return model.getId();
   }
   public Double balance()
   {
   return model.getBalance();
   }
   public void updateView() {
   view.Accountview(model.getName(), model.getId(),model.getBalance());
   }
   }

TEst

package account.model;

   public class MVCPatternTest {
       public static void main(String[] args) {
           AccountModel model = retriveaccountFromDB();
           AccountView view = new AccountView();
           AccountController controller = new AccountController(model, view);
           System.out.println("Initially... ======================");
           controller.updateView();
          
           System.out.println(" After Deposit... ======================");
           model.deposit(1234589.0);
           controller.updateView();

           System.out.println(" After Withdrawal... ======================");
           model.withdraw(12345.0);
           controller.updateView();

           System.out.println(" Balance in Euro... =======================");
           model.editin_euro();
           controller.updateView();

           System.out.println(" Balance in Yuan... ======================");
           model.editin_yuan();
           controller.updateView();

           }
          
           private static AccountModel retriveaccountFromDB() {
      
           AccountModel account= new AccountModel("1070","Strreter Angela M",34.4360);

           account.getBalance();
  
          
           return account;
           }
           }

Explanation / Answer

Put the accounts into an array list with a hashmap for example :

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.concurrent.atomic.AtomicInteger;

import org.springframework.util.StringUtils;

public class StubAccountManager implements AccountManager {

private final Map<String, Account> accounts;

private final AtomicInteger nextNumber = new AtomicInteger(3);

public StubAccountManager() {

this.accounts = new HashMap<String, Account>();

addAccount("a1", "Jay");

addAccount("a2", "Jason");

addAccount("a3", "Julie");

}

private void addAccount(String number, String name) {

this.accounts.put(number, new Account(number, name));

}

@Override

public List<Account> getAccounts() {

return new ArrayList<Account>(this.accounts.values());

}

@Override

public Account getAccount(String number) {

Account account = this.accounts.get(number);

if (account == null) {

throw new AccountNotFoundException(number);

}

return account;

}

@Override

public void saveOrUpdate(Account account) {

if (!StringUtils.hasText(account.getNumber())) {

account.setNumber(getNextNumber());

}

this.accounts.put(account.getNumber(), account);

}

private String getNextNumber() {

return "a" + this.nextNumber.incrementAndGet();

}

@Override

public void delete(Account account) {

this.accounts.remove(account.getNumber());

}

}

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