// Textbook fragment 01.06
public class Test {
  public static void main(String[] args) {
    CreditCard wallet[] = new CreditCard[10];
    wallet[0] = new CreditCard("5391 0375 9387 5309",
                          "John Bowman", "California Savings", 0.0, 2500);
    wallet[1] = new CreditCard("3485 0399 3395 1954",
                          "John Bowman", "California Federal", 0.0, 3500);
    wallet[2] = new CreditCard("6011 4902 3294 2994",
                          "John Bowman", "California Finance", 0.0, 5000);
    for (int i=1; i<=16; i++) {
      wallet[0].chargeIt((double)i);
      wallet[1].chargeIt(2.0*i);        // implicit cast
      wallet[2].chargeIt((double)3*i);  // explicit cast
    }
    for (int i=0; i<3; i++) {
      CreditCard.printCard(wallet[i]);
      while (wallet[i].getBalance() > 100.0) {
        wallet[i].makePayment(100.0);
        System.out.println("New balance = " + wallet[i].getBalance());
      }
    }
  }
}