BankAccount and Bank

Part 1

Write a BankAccount class that has an int account number and a double balance for instance variables. Overloaded constructors take either an account number and no balance (in which case the balance is initialized to 0), or an account number and a balance. Then write four methods for the class:

• getAccountNumber()
• deposit(float amount)
• withdraw(float amount)
• getBalance()

Part 2

Write a Bank class that uses an ArrayList to keep track of a series of BankAccount objects. The constructor creates a Bank instance with no bank accounts to begin with. Methods to write for this class include:

• addAccount(BankAccount a) -- adds the specified bank account to the bank
• getTotalBalance() -- returns the total value of all the accounts in the bank
• count(double minimum) -- returns the number of accounts at the bank that have at least the specified minimum balance
• find(int accountNumber) -- returns the BankAccount object with the indicated account number. Returns null if no matching account number is found.
• getMaximum() -- returns the BankAccount with the largest balance
• deposit(int accountNumber, double amount) -- adds the indicated amount to the BankAccount with the specified account number
• withdraw(int accountNumber, double amount) -- withdraws the indicated amount from the BankAccount with the specified account number
• getBalance(int accountNumber) -- returns the balance from the BankAccount with the specified account number