Thread: I need help with an assignment. could anyone walk me through this or give me an example to help.. I have no idea what I'm doing

Create a class called BankAccount. The BankAccount class should contain a String to store the customer name and a double to store the account balance. The BankAccount class should have two constructors, as follows:

public BankAccount(String name, double balance)
throws NegativeAmountException
{
// set name and balance
// make sure balance is not negative
// throw exception if balance is negative
}
public BankAccount(String name)
throws NegativeAmountException
{
// set name and use 0 balance
}

As can be seen, the first constructor throws a NegativeAmountException if the balance being used to create the bank account is negative. You will have to create this exception class yourself.

The BankAccount class should also contain methods to make a deposit, make a withdrawal, get the current balance, and print a bank account statement. The interfaces for these methods should appear as follows:

// update balance by adding deposit amount
// make sure deposit amount is not negative
// throw exception if deposit is negative

public void deposit(double amount) throws NegativeAmountException
// update balance by subtracting withdrawal amount
// throw exception if funds are not sufficient
// make sure withdrawal amount is not negative
// throw NegativeAmountException if amount is negative
// throw InsufficientFundsException if balance < amount

public void withdraw(double amount)
throws InsufficientFundsException, NegativeAmountException
// return current balance

public double getBalance()
// print bank statement including customer name
// and current account balance
public void printStatement();

Use the BankAccount class as the superclass for a SavingsAccount class. In addition to the behaviors of a BankAccount, a SavingsAccount also accumulates interest; therefore, the SavingsAccount class contains a double that is populated with the current interest rate. In addition to its constructors (you decide what the constructors should be), the SavingsAccount class should contain the following methods:

// post monthly interest by multiplying current balance
// by current interest rate divided by 12 and then adding
// result to balance by making deposit

public void postInterest()
// print bank statement including customer name
// and current account balance (use printStatement from
// the BankAccount superclass)
// following this also print current interest rate

public void printStatement()

Once these two classes are completed, create a driver class called Main containing a main method that tests the SavingsAccount class. Within the driver test class, create a SavingsAccount object and then use it to make deposits and withdrawals, and to post the monthly interest.

To make the program simpler, you can incorporate the initial data for the Savings Accounts directly in the program (e.g., no need to prompt for the account holder name or starting balance). The only things you need to prompt for are the deposit amount and the withdrawal amount. Also, to simplify the task, the only exceptions that you should handle are the NegativeAmountException and the InsufficientFundsException. If either of these exception conditions occurs, print an appropriate error message and terminate the application. You can simply re-throw any IOExceptions from the main.

there needs to be five java files. NegativeAmountException, InsufficientFundsException, BankAccount class, SavingsAccount class, and a driver class Main.

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