Question

Implement a class Portfolio. This class has two objects, checking and savings, of the type BankAccount.
Implement four methods:
• public void deposit(double amount, String account)
• public void withdraw(double amount, String account)
• public void transfer(double amount, String account)
• public double getBalance(String account)
Here the account string is "S" or "C". For the deposit or withdrawal, it indicates which account is affected. For a transfer, it indicates the account from which the money is taken; the money is automatically transferred to the other account.
Change the test class to perform the actions using the Portfolio class.

I need a separate BankAccount class that will work with my Portfolio class.

public class Portfolio

{

private BankAccount checking;

private BankAccount savings;

public Portfolio(double aChecking, double aSavings)

{

checking = new BankAccount(aChecking);

savings = new BankAccount(aSavings);

}

public void deposit(double amount, String account)

{

if (account.equals("S"))

{

savings.deposit(amount);

}

else if (account.equals("C"))

{

checking.deposit(amount);

}

}

public void withdraw(double amount, String account)

{

if (account.equals("S"))

{

savings.withdraw(amount);

}

else if (account.equals("C"))

{

checking.withdraw(amount);

}

}

public void transfer(double amount, String account)

{

if (account.equals("S"))

{

savings.withdraw(amount);

checking.deposit(amount);

}

else if (account.equals("C"))

{

checking.withdraw(amount);

savings.deposit(amount);

}

}

public double getBalance(String account)

{

double result = -1;

if (account.equals("S"))

{

result = savings.getBalance();

}

else if (account.equals("C"))

{

result = checking.getBalance();

}

return result;

}

}

class Tester {

public static void main(String[] args)

{

double checking = 100;

double savings = 50;

Portfolio portfolio1 = new Portfolio(checking, savings);

portfolio1.deposit(100, "C");

portfolio1.withdraw(300, "C");

portfolio1.transfer(20, "S");

System.out.println("Savings: " + portfolio1.getBalance("S"));

System.out.println("Checking: " + portfolio1.getBalance("C"));

}

}

Answer 1

/*******************************Portfolio.java****************/

/**
* The Class Portfolio.
*/
public class Portfolio

{

   /** The checking. */
   private BankAccount checking;

   /** The savings. */
   private BankAccount savings;

   /**
   * Instantiates a new portfolio.
   *
   * @param aChecking the a checking
   * @param aSavings the a savings
   */
   public Portfolio(double aChecking, double aSavings)

   {

       checking = new BankAccount(aChecking);

       savings = new BankAccount(aSavings);

   }

   /**
   * Deposit.
   *
   * @param amount the amount
   * @param account the account
   */
   public void deposit(double amount, String account)

   {

       if (account.equals("S"))

       {

           savings.deposit(amount);

       }

       else if (account.equals("C"))

       {

           checking.deposit(amount);

       }

   }

   /**
   * Withdraw.
   *
   * @param amount the amount
   * @param account the account
   */
   public void withdraw(double amount, String account)

   {

       if (account.equals("S"))

       {

           savings.withdraw(amount);

       }

       else if (account.equals("C"))

       {

           checking.withdraw(amount);

       }

   }

   /**
   * Transfer.
   *
   * @param amount the amount
   * @param account the account
   */
   public void transfer(double amount, String account)

   {

       if (account.equals("S"))

       {

           savings.withdraw(amount);

           checking.deposit(amount);

       }

       else if (account.equals("C"))

       {

           checking.withdraw(amount);

           savings.deposit(amount);

       }

   }

   /**
   * Gets the balance.
   *
   * @param account the account
   * @return the balance
   */
   public double getBalance(String account)

   {

       double result = -1;

       if (account.equals("S"))

       {

           result = savings.getBalance();

       }

       else if (account.equals("C"))

       {

           result = checking.getBalance();

       }

       return result;

   }

}

/****************************BankAccount.java*******************/

/**
* The Class BankAccount.
*/
public class BankAccount {

   /** The balance. */
   private double balance;

   /**
   * Instantiates a new bank account.
   *
   * @param balance the balance
   */
   public BankAccount(double balance) {
       super();
       this.balance = balance;
   }

   /**
   * Deposit.
   *
   * @param amount the amount
   */
   public void deposit(double amount) {

       this.balance += amount;
   }

   /**
   * Withdraw.
   *
   * @param amount the amount
   */
   public void withdraw(double amount) {

       if (amount < balance)
           this.balance -= amount;
   }

   /**
   * Gets the balance.
   *
   * @return the balance
   */
   public double getBalance() {

       return balance;
   }

}
/*****************************TestPortfolio.java********************/

public class TestPortfolio {
   public static void main(String[] args)

   {

       double checking = 100;

       double savings = 50;

       Portfolio portfolio1 = new Portfolio(checking, savings);

       portfolio1.deposit(100, "C");

       portfolio1.withdraw(300, "C");

       portfolio1.transfer(20, "S");

       System.out.println("Savings: " + portfolio1.getBalance("S"));

       System.out.println("Checking: " + portfolio1.getBalance("C"));

   }
}
/*********************output*********************/

Savings: 30.0
Checking: 220.0

2 Console X <terminated> TestPortfolio [Java Application] C:\Pru Savings: 30.0 Checking: 220.0

Please let me know if you have any doubt or modify the answer, Thanks :)