java project loans NullPointerException

Question

Can anyone help me fix this exception? The Results coming up but still getting the error. There are four other classes connected to it.

public class CreateLoans {
    public static void main(String[] args) {

        Scanner s = new Scanner(System.in);
        int num;
        int term;
        int choice;
        String name;
        double amount;
        Loan[] w = new Loan[5];
        for (int i = 0; i < 1; i++) {
            System.out.println("Choose Loan Type: 1 Business Loan 2 Personal Loan");
            choice = s.nextInt();
            if (choice == 1) {
                System.out.print("Enter Loan Number: ");
                num = s.nextInt();
                System.out.print("Enter Last Name: ");
                s.nextLine();
                name = s.nextLine();
                System.out.print("Enter Loan Amount: ");
                amount = s.nextDouble();
                System.out.print("Enter Number of Terms: ");
                term = s.nextInt();
                w[i] = new BusinessLoan(num, name, amount, term);
            } else if (choice == 2) {
                System.out.print("Enter Loan Number: ");
                num = s.nextInt();
                System.out.print("Enter Last Name: ");
                s.nextLine();
                name = s.nextLine();
                System.out.print("Enter Loan Amount: ");
                amount = s.nextDouble();
                System.out.print("Enter Number of Terms: ");
                term = s.nextInt();

                w[i] = new PersonalLoan(num, name, amount, term);
            } else {
                System.out.println("Error, Please Enter 1 Or 2");
            }
        }
        for (int i = 0; i < w.length; i++) {
            System.out.println(w[i].toString());
        }
    }

}

Answer 1

Not sure what do you want to do: you have only one object created since your for loop is:

for (int i = 0; i < 1; i++) {// the code inside this loop only execute one time
   ...
}

But you have five elements in your array Loan[] w = new Loan[5];

sure when the second loop:

for (int i = 0; i < w.length; i++) {
    System.out.println(w[i].toString());
}

when i comes to 1, the w[i] (w[ 1 ]) will be null, so when you call w[i].toString(), you will get a NullPointerException

Quick fix should be change for (int i = 0; i < 1; i++) to for (int i = 0; i < w.length; i++) and make sure choice = s.nextInt(); you are entering only is 1 or 2, or there still will be a null value in the middle of w array