sale.java

一个出售卡片信息的源码 是我的一个作业

public class Sale {

  /**
   * Constructor
   * @param cardName String
   */
  public Sale(String stuffName,String cardCode,int quantity) throws Exception {
    saleCard(stuffName,cardCode,quantity);
  }

  /**
   * saleCard
   *
   * @param stuffName String
   * @param cardName String
   * @param quantity int
   */
  private void saleCard(String stuffName, String cardCode, int quantity) throws Exception{

    if(stuffName==null||"".equals(stuffName)){
      throw new Exception("Please insert the name of the stuff");
    }
    if(cardCode==null||"".equals(cardCode)){
      throw new Exception("Please insert the index of the card");
    }
    Card c = CardList.getCard(cardCode);
    int num = c.getQuantity();
    if(quantity>num){
      throw new Exception("Not enough cards");
    }
    if(quantity<=0){
      throw new Exception("The quantity must be larger then 0");
    }
    try {
      SaleList.saleCard(stuffName, cardCode, quantity);
    }
    catch (Exception ex) {
      throw ex;
    }
  }
}