首頁猿問我可以在Java中替換單個變量的值嗎？

我可以在Java中替換單個變量的值嗎？

Java

慕田峪9158850 2022-09-21 16:39:51

我有一個程序，用戶在產品菜單中選擇他們的產品，在他們輸入項目ID和數量后，程序將詢問他們是否要購買另一個，如果是，則交易再次重復并提出相同的問題。我的核心問題是我可以替換單個變量中的值嗎？ Scanner id = new Scanner (System.in); String products [] = {"Donut", "Ice Cream", "Kitkat", "Marshmallow", "Nutella"}; int prices [] = {25, 15, 40, 60, 150}; int number [] = {0, 1, 2 ,3 , 4}; char result [] = {'a', 'b', 'c','d'}; System.out.println(" Menu "); System.out.println("Item ID\tItem Name\tPrice (Php)"); System.out.println(number [0]+"\t"+products [0]+"\t\t"+prices[0]); System.out.println(number [1]+"\t"+products [1]+"\t"+prices[1]); System.out.println(number [2]+"\t"+products [2]+"\t\t"+prices[2]); System.out.println(number [3]+"\t"+products [3]+"\t"+prices[3]); System.out.println(number [4]+"\t"+products [4]+"\t\t"+prices[4]); System.out.println(); System.out.print("Select ID Number: "); int ID = id.nextInt(); System.out.println("Input quantity: "); int QUANTITY = id.nextInt(); System.out.println("Product ID: "+ID); int a = ID; System.out.println("Product Name: "+products[ID]); String b = products[ID]; System.out.println("Quantity: "+QUANTITY); int c = QUANTITY; System.out.println("Product Price: "+prices[ID]); int d = prices[ID]; System.out.println("Amount to be Paid: "+(QUANTITY * prices[ID])); int e = QUANTITY * prices[ID]; System.out.println("Added to cart, want to buy another? [Y] [N]"); char keys = id.next().charAt(0); switch (keys) { case 'Y': method6(); break; }輸出必須是產品ID，名稱，數量和數量必須以共享單個變量的不同值顯示。

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1 回答

qq_笑_17

TA貢獻1818條經驗獲得超7個贊

你可以使用你可以使用不清楚你不能做什么。List<String>String s =id+" | " + name + " | " + quantity + " | " + amount

但是，如果需要，您可以創建對象，并將其命名為...菜單。

public class Menu {

private int productId;

private int quantity;

private int price;

private int totalPrice;

private String productName;

public Menu(){}

public Menu(int productId,int quantity,int price,int totalPrice,String productName){

this.productId=productId;

this.quantity=quantity;

this.price=price;

this.totalPrice=totalPrice;

this.productName=productName;

}

//setters and getters

public void setProductId(int productId) {

this.productId = productId;

}

public int getProductId() {

return productId;

}

public void setProductName(int productName) {

this.productName= productName;

}

public int getProductName() {

return productName;

}

public int getQuantity() {

return quantity;

}

public void setQuantity(int quantity) {

this.quantity = quantity;

}

public int getPrice() {

return price;

}

public void setPrice(double price) {

this.price = price;

}

public int getTotalPrice() {

return totalPrice;

}

public void setTotalPrice(double totalPrice) {

this.totalPrice = totalPrice;

}

在你當前的課程中，你可以做一些類似的東西

Menu menu=new Menu();

System.out.print("Select ID Number: ");

menu.setProductId(id.nextInt());

System.out.println("Input quantity: ");

menu.setQuantity(id.nextInt());

System.out.println("Quantity: "+menu.getQuantity());

menu.setProductName(products[menu.getProductId()])

System.out.println("Product Name: "+menu.getProductName());

menu.setPrice(prices[menu.getProduct(id)]);

menu.setTotalPrice(menu.getPrice()*menu.getQuantity());

System.out.println("Amount to be Paid: "+menu.getTotatPrice());

反對回復 2022-09-21

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