? ? ? ? 商品類

package Supermarket20240704;public class Commodity {private String name;private double price;private int inventory;public Commodity(){};public Commodity(String name, double price, int inventory){this.name = name;this.price = price;this.inventory = inventory;}public void setName(String name){this.name = name;}public void setPrice(double price){this.price = price;}public void setInventory(int inventory){this.inventory = inventory;}public String getName(){return this.name;}public double getPrice(){return this.price;}public int getInventory(){return this.inventory;}public void sale(int saleNumbers){int remainInventory = this.inventory - saleNumbers;this.setInventory(remainInventory);}public void discount(int discount){if(discount < 10 && discount >0){double newPrice = this.price * (discount / 10.0);this.setPrice(newPrice);}}
}

? ? ? ? 測試

package Supermarket20240704;
import java.util.Scanner;
public class CommodityTest {public static void main(String[] args) {Scanner sc = new Scanner(System.in);System.out.println("請輸入一共有多少種商品");int category = sc.nextInt();Commodity[] commodityCategory = new Commodity[category];for (int i = 0; i < commodityCategory.length; i++) {System.out.printf("請輸入第%d個商品的名字", i + 1);String name = sc.next();System.out.printf("請輸入第%d個商品的價格", i + 1);double price = sc.nextDouble();System.out.printf("請輸入第%d個商品的庫存", i + 1);int inventory = sc.nextInt();Commodity goods = new Commodity(name, price, inventory);commodityCategory[i] = goods;System.out.printf("第%d個商品成功上架\n", i + 1);}System.out.printf("\t\t\t\t\t貨架\n");System.out.printf("\t\t品名\t\t價格\t\t庫存\t\t\n");for (int i = 0; i < commodityCategory.length; i++) {System.out.printf("\t\t%s\t\t%.2f\t\t%d\n", commodityCategory[i].getName(),commodityCategory[i].getPrice(), commodityCategory[i].getInventory());}double average = calculateAverage(commodityCategory);System.out.printf("%d種商品的平均價格是%.2f\n", commodityCategory.length, average);}public static double calculateAverage(Commodity[] calculateCategory){double sum = 0;for (int i = 0; i < calculateCategory.length; i++) {sum += calculateCategory[i].getPrice();}return sum / (calculateCategory.length);}
}

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