1回答

• 

  ATMYBEST

  2018-08-07 11:10:18

  
  

  public double calTotalPrice() {

  double totalPrice = 0.0;

  for(Entry<Items, Integer> en:goods.entrySet()) {

  totalPrice = totalPrice + en.getKey().getPrice() * en.getValue();

  }

  this.setTotalPrice(totalPrice);

  return totalPrice;

  }

  
  

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