將多個值存儲到變量中（不使用集合或數組）

Question

我目前正在將setHousePrice（）方法應用於較大的OOP項目。但是，該程序沒有按照我的預期行事。所有的值都存儲在變量housePrice中，但在我看來，每次存儲新值都會覆蓋之前的值。

我的問題是，我該如何修改代碼以將多個房價存儲到一個變量中（如果可能的話）？有沒有辦法做到這一點，而不使用數組或集合？

下面是類代碼：

import java.util.Scanner; 

public class BuyAHouseInc2 
{ 
private int houseCounter; 
private int amountOfHouses; 
private int housePrice; 

// method that sets the house price 
    public void setHousePrice() 
    { 
     System.out.println("\n--------------------"); 
     System.out.println("Set House Prices"); 
     System.out.println("--------------------"); 

     houseCounter = 1; 
     do 
     { 
      System.out.print("\nPlease enter the price of house " + houseCounter + ": " + "€"); 
      Scanner input = new Scanner(System.in); 
      housePrice = input.nextInt(); 

       if(housePrice > 0) 
       { 
        this.housePrice = housePrice; 
        houseCounter++; 
       } 
       else 
       { 
        System.out.println("Enter a valid house price..."); 
       } 

     } 
     while(houseCounter <= amountOfHouses); 
    } 
} 

這是測試代碼：

public class BuyAHouseIncTester2 
{ 
    public static void main(String args[]) 
    { 
    // client 1 details 
    BuyAHouseInc2 client1 = new BuyAHouseInc2 ("John","Doyle","15 Newton Drive\nDublin 5\n", 550000) 

    // set house price for each of the houses added to database 
    client1.setHousePrice(); 
    } 
} 

這是它在終端運行：

Answer 1

首先你需要創建應用程序的新設計。

例如，創建House類：

public class House { 
    private int numberOfHouse; 
    private int housePrice; 
} 

而在這之後閱讀Arrays和Collections

Answer 2

是的，這是事實。你只是在一個變量中存儲不同房屋的價格。

我建議一些改動：

1. 創建一個類房子。它包含您可能需要的價格和其他信息。

2. 創建房屋的ArrayList。在這種情況下，ArrayList的大小就是房屋的數量，並且通過遍歷它來獲得每個房屋。

   public class House 
   { 
       int housePrice = 0; 
   
       void setPrice(int price) 
       { 
        housePrice = price; //You've checked before 
       } 
   } 
   

   而且：

讓我們對代碼的談話

import java.util.Scanner; 

public class BuyAHouseInc2 
{ 
    private int amountOfHouses; 
    private ArrayList<House> houses; 

    public BuyAHouseInc2(int amountOfHouses) 
    { 
     this.amountOfHouses = amountOfHouses; 
     houses = new ArrayList<>(amountOfHouses); 
    } 

    // method that sets the house price 
     public void setHousePrice() 
     { 
      System.out.println("\n--------------------"); 
      System.out.println("Set House Prices"); 
      System.out.println("--------------------"); 

      int houseCounter = 0; 
      do 
      { 
       System.out.print("\nPlease enter the price of house " + houseCounter + ": " + "€"); 
       Scanner input = new Scanner(System.in); 
       int housePrice = input.nextInt(); 

        if(housePrice > 0) 
        { 
         House h = new House(); 
         h.setPrice(housePrice); 
         houses.add(h); 
         houseCounter++; 
        } 
        else 
        { 
         System.out.println("Enter a valid house price..."); 
        } 

      } 
      while(houseCounter < amountOfHouses); 
     } 
}