购物车使用两个文件（类和主方法）Java

Question

创建两个要提交的文件：ItemToPurchase。java类定义ShoppingCartPrinter。java-Contains main（）方法

~使用以下规范构建ItemToPurchase类：

私有字段
-String itemName-在默认构造函数中初始化为无
-int itemPrice-在默认构造函数中初始化为0
-int itemQuantity-在默认构造函数中初始化为0
Default构造函数
公共成员方法（突变体

-在main（）中，提示用户两个项目并创建ItemToPurChase类的两个对象，在提示第二个项目之前，调用scnr.nextLine（）；允许用户输入新字符串。

-将这两个项目的成本相加，输出总成本。

以下是我购买CartPrinter的代码：

    public static void main(String[] args) { 
      Scanner scnr = new Scanner(System.in);
      ItemToPurchase item1 = new ItemToPurchase();
      ItemToPurchase item2 = new ItemToPurchase();

      //String inputName = "";
      //int inputPrice = 0;
      //int inputQuantity = 0;

      item1.setName("testName");
      item1.setQuantity(1);
      item1.setPrice(1);

      String itemName = item1.getName();
      int itemQuantity = item1.getQuantity();
      int itemPrice = item1.getPrice();

      System.out.println(itemName);
      System.out.println(itemPrice);
      System.out.println(itemQuantity);

    }
    //Add the costs of the two items together and output the total cost.
}

以下是我的ItemToPurchase代码：

    public class ItemToPurchase {

   // The class' private internal fields
   private String itemName;
   private int itemPrice;
   private int itemQuantity;

    // The class' public methods

   public void setName(String inputName) {
       itemName = inputName;
   }
   public String getName() {
      return itemName;
   }
   public void setPrice(int inputPrice) {
       itemPrice = inputPrice;
   }
   public int getPrice() {
      return itemPrice;
   }
   public void setQuantity(int inputQuantity) {
       itemQuantity = inputQuantity;
   }
   public int getQuantity() {
       return itemQuantity;
   }
}

Answer 1

对于ShoppingCartPrinter，这样做：

import java.util.Scanner;

class ShoppingCartPrinter
{
   public static void main(String[] args)
   {
      Scanner scnr = new Scanner(System.in);
      String item1 = "";
      String item2 = "";
      int price1      = 0;
      int price2      = 0;
      int quantity1   = 0;
      int quantity2   = 0;

      ItemToPurchase itemInfo1 = new ItemToPurchase();
      ItemToPurchase itemInfo2 = new ItemToPurchase();

      System.out.println("Item 1");
      System.out.println("Enter the item name:");
      itemInfo1.setName(scnr.nextLine());

      System.out.println("Enter the item price:");
      itemInfo1.setPrice(scnr.nextInt());

      System.out.println("Enter the item quantity:");
      itemInfo1.setQuantity(scnr.nextInt());
      System.out.println();

      System.out.println("Item 2");
      itemInfo2.setName(scnr.nextLine());
      System.out.println("Enter the item name:");
      itemInfo2.setName(scnr.nextLine());

      System.out.println("Enter the item price:");
      itemInfo2.setPrice(scnr.nextInt());

      System.out.println("Enter the item quantity:");
      itemInfo2.setQuantity(scnr.nextInt());
      System.out.println();

      System.out.println("TOTAL COST");

      System.out.println(itemInfo1.getName() + " " + itemInfo1.getQuantity() + " @ $" + itemInfo1.getPrice() + " = $" + (itemInfo1.getPrice() * itemInfo1.getQuantity()));

      System.out.println(itemInfo2.getName() + " " + itemInfo2.getQuantity() + " @ $" + itemInfo2.getPrice() + " = $" + (itemInfo2.getPrice() * itemInfo2.getQuantity()));

      System.out.println();

      System.out.println("Total: $" + ((itemInfo1.getPrice() * itemInfo1.getQuantity()) + (itemInfo2.getPrice() * itemInfo2.getQuantity())));

   }
 }

然后对于ItemToprint，这与它匹配：

public class ItemToPurchase
{
    private String itemName;
    private int itemPrice;
    private int itemQuantity;

    public ItemToPurchase()
    {
        this.itemName = "none";
        this.itemPrice = 0;
        this.itemQuantity = 0;
    }

    public ItemToPurchase(String itemName, int itemPrice, int itemQuantity)
    {
        this.itemName = itemName;
        this.itemPrice = itemPrice;
        this.itemQuantity = itemQuantity;
    }

    public void setName(String itemName)
    {
        this.itemName = itemName;
    }

    public String getName()
    {
        return itemName;
    }

    public void setPrice(int itemPrice)
    {
        this.itemPrice = itemPrice;
    } 

    public int getPrice()
    {
        return itemPrice;
    }

    public void setQuantity(int itemQuantity)
    {
        this.itemQuantity = itemQuantity;
    }

    public int getQuantity()
    {
        return itemQuantity;
    }

}