我正在嘗試實施鞋的庫存計劃。我想要做的是給每隻鞋一個id(productId)和一定數量的鞋子(ammountToPick)。我希望能夠讓運行該程序的用戶輸入鞋號來獲取庫存中剩餘的那種鞋子的數量(ammountToPick)。我目前與我的程序有關的問題是它沒有返回任何內容,只是不斷打印「無效的產品ID」。在Java中實施鞋庫存程序時遇到困難
我提供我下面的代碼:
public class Product {
private String productId = "";
private int ammountToPick = 0;
private int ammountToRestock = 0;
public Product (String productId, int ammountToPick){
this.productId = productId;
this.ammountToPick = ammountToPick;
}
public String getProductId() {
return productId;
}
public int getAmmountToPick() {
return ammountToPick;
}
}
public class Shoes extends Product{
public Shoes(String productId, int ammountToPick){
super(productId, ammountToPick);
}
}
import java.util.Scanner;
public class Inventory
{
private static String productId = "";
private int ammountToPick = 0;
private int ammountToRestock = 0;
public static final int MAX_ITEMS = 999999;
private static Product product [] = new Shoes[MAX_ITEMS];
public static void main (String args[]){
buildInventory();
getInventory();
}
public static void buildInventory(){
product[1] = new Shoes("shoe101", 19);
product[2] = new Shoes("shoe200", 1);
product[3] = new Shoes("shoe420", 9);
}
public static void getInventory() {
Scanner input = new Scanner(System.in);
System.out.println("Enter the product id of the product you would like to pick: ");
String userinput = input.nextLine();
if(userinput.equals(productId)) {
System.out.println("there are" + product[1].getAmmountToPick() +"left");
}
else {
System.out.println("invalid product id ");
}
}
}
您絕不會將productId初始化爲除空字符串外的任何內容,因此它始終是空字符串。 – Malphrush
我已經更新了我的回答 – ControlAltDel