creditcard.java

来自「文件说明java模式」· Java 代码 · 共 66 行

public class CreditCard {

  String cardType;
  String cardNumber;
  String cardExpDate;

  //final String CC_DATA_FILE = "CC.txt";

  final String CC_DATA_FILE = "CreditCardInfo.txt";

  //constructor of CreditCard
  public CreditCard(String ccType, String ccNumber,
                    String ccExpDate) {
    cardType = ccType;
    cardNumber = ccNumber;
    cardExpDate = ccExpDate;
  }

  //check if the credit card number is valid or not
  //length of number for Visa is 16
  //length of number for  Discover is 15
  //length of number for  MASTER is 16
  public boolean isValid() {
    /*
     	Let's go with simpler validation
     	here to keep the example simpler.
     */
    if (getCardType().equals(AccountManager.VISA)) {
      return (getCardNumber().trim().length() == 16);
    }
    if (getCardType().equals(AccountManager.DISCOVER)) {
      return (getCardNumber().trim().length() == 15);
    }
    if (getCardType().equals(AccountManager.MASTER)) {
      return (getCardNumber().trim().length() == 16);
    }

    return false;
  }

  //save credit card info to cc.txt
  public boolean save() {
    FileUtil futil = new FileUtil();
    String dataLine =
      getCardType() + "," + getCardNumber() + "," +
      getCardExpDate();
    return futil.writeToFile(CC_DATA_FILE, dataLine, true,
           true);
  }
  public String getCardType() {
    return cardType;
  }
  public String getCardNumber() {
    return cardNumber;
  }
  public String getCardExpDate() {
    return cardExpDate;
  }

}