Java

OOP GUIDE / WORK

BANKACCOUNT CLASS SOLUTIONS

TASK – PART 1 – BANKACCOUNT CLASS

Here is my solution:

public class BankAccount

{

//INSTANCE VARIABLES

public double balance;

public String firstName;

public String lastName;

//CONSTRUCTOR

public BankAccount(String fn, String ln)

{

balance = 0.0;

firstName = fn;

lastName = ln;

}

//INSTANCE METHODS

public void deposit(double amount)

{

balance = balance + amount;

}

public void withdraw(double amount)

{

balance = balance - amount;

}

public String fullName()

{

return firstName + " " + lastName;

}

public boolean inOverDraft()

{

if (balance < 0)

return true;

else

return false;

}

public String toString()

{

return fullName() + "($" + balance + ")";

}

}

TASK – PART 2 – TESTING YOUR BANKACCOUNT CLASS

Here is my solution:

public class BankAccountTester

{

public static void main(String[] args)

{

BankAccount ba = new BankAccount("Jimbob", "Twoshoes");

System.out.println(ba);

ba.deposit(1000);

System.out.println(ba);

ba.withdraw(10);

System.out.println(ba);

ba.withdraw(996);

System.out.println(ba);

if (ba.inOverDraft())

{

System.out.println("BankAccount status: Bad");

}

else

{

System.out.println("BankAccount status: Good");

}

ba.deposit(50);

System.out.println(ba);

if (ba.inOverDraft())

{

System.out.println("BankAccount status: Bad");

}

else

{

System.out.println("BankAccount status: Good");

}

}

}

The above code outputs the following:

Jimbob Twoshoes($0.0)

Jimbob Twoshoes($1000.0)

Jimbob Twoshoes($990.0)

Jimbob Twoshoes($-6.0)

BankAccount status: Bad

Jimbob Twoshoes($44.0)

BankAccount status: Good