Bank Account Program Logic Error

Question

I create a very basic bank account program for homework and I keep getting a logic error. Instead of the program giving the total balance after the depositing, withdrawing, and adding interest it just outputs the amount deposited - withdrawn.I appreciate the help, thanks!

public class BankAccount 
{

    public BankAccount(double initBalance, double initInterest)
    {
        balance = 0;
        interest = 0;
    }

    public void deposit(double amtDep)
    {
        balance = balance + amtDep;
    }

    public void withdraw(double amtWd)
    {
        balance = balance - amtWd;
    }

    public void addInterest()
    {
        balance = balance + balance * interest;
    }

    public double checkBal()
    {
        return balance;
    }

    private double balance;
    private double interest;
}

Test Class

public class BankTester
{

    public static void main(String[] args) 
    {
        BankAccount account1 = new BankAccount(500, .01);
        account1.deposit(100);
        account1.withdraw(50);
        account1.addInterest();
        System.out.println(account1.checkBal());
        //Outputs 50 instead of 555.5
    }

}

Answer 1

I believe the problem is in your constructor:

public BankAccount(double initBalance, double initInterest)
{
    balance = 0; // try balance = initBalance
    interest = 0; // try interest = initInterest
}