Below are two classes. One defines a bank account, the other uses it to create an account. Copy the two classes into BlueJ.
Complete the BankAccount class by adding the following methods:
/** >>>>>>>>>>>>>>>>>>> CLASS BankAccount <<<<<<<<<<<<<<<<<<
* A bank account has a balance that can be changed by
* deposits and withdrawals.
*/
public class BankAccount
{
private double balance; // instance variables are usually private
private double interestRate;
/**
* Constructor (0 parameters): Constructs a bank account with a zero balance
* >>> method overloading: more that 1 method with same name
*/
public BankAccount()
{
balance = 0;
interestRate = 0;
}
/**
* Constructor (1 parameter): Constructs a bank account with a given balance
*/
// <<<<<<------ COMPLETE THE CODE ------>>>>>>
/**
* Constructor (2 parameter): both the initial balance
* and interest rate are set when a new account is created
*/
// <<<<<<------ COMPLETE THE CODE ------>>>>>>
/**
* deposit - Method to deposit money into the bank account.
* Adds the amount given to the account balance
*/
// <<<<<<------ COMPLETE THE CODE ------>>>>>>
/**
* withdraw - Method to withdraw money from the bank account.
* Subtracts the amount given from the account.
*/
// <<<<<<------ COMPLETE THE CODE ------>>>>>>
/**
* Gets the current balance of the bank account.
*/
public double getBalance()
{
return balance;
}
/**
* closeAccount - sets the balance to zero and returns the amount of
* money which was in the account before it closed
*/
// <<<<<<------ COMPLETE THE CODE ------>>>>>>
/**
* setInterestRate - takes a decimal value as a parameter and sets a
* variable called interestRate to the value input.
*/
// <<<<<<------ COMPLETE THE CODE ------>>>>>>
/**
* getInterestRate - returns the current interest rate as a decimal value
*/
// <<<<<<------ COMPLETE THE CODE ------>>>>>>
/**
* addInterest - Method to add Interest to the account balance
*/
// <<<<<<------ COMPLETE THE CODE ------>>>>>>
}
/**
A class to test the BankAccount class.
*/
public class BankAccountTest
{
public static void main(String[] args)
{
BankAccount mrHaasBigMoney; // haasBigMoney is a object variable,
// it references an object
mrHaasBigMoney = new BankAccount(); // initialize to new bankaccount
System.out.println("Mr Haas >> " + mrHaasBigMoney.getBalance());
mrHaasBigMoney.deposit(2000);
System.out.println("Mr Haas >> " + mrHaasBigMoney.getBalance());
mrHaasBigMoney.withdraw(500);
System.out.println("Mr Haas >> " + mrHaasBigMoney.getBalance());
mrHaasBigMoney.setInterestRate(0.02);
mrHaasBigMoney.addInterest();
System.out.println("Mr Haas >> " + mrHaasBigMoney.getBalance());
BankAccount mrsHaasBigMoney; // create another bank account
mrsHaasBigMoney = mrHaasBigMoney;
System.out.println("Mrs Haas >> " + mrsHaasBigMoney.getBalance());
mrsHaasBigMoney.withdraw(1000);
System.out.println("Mrs Haas >> " + mrsHaasBigMoney.getBalance());
System.out.println("Mr Haas >> " + mrHaasBigMoney.getBalance());
}
}