为什么我收到错误“方法未定义类型”? [英] Why am I getting the error "the Method Is Undefined for the type"?
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问题描述
我正在大学学习基础知识,并希望得到Eclipse的以下错误的一些帮助:方法getCost()未定义类型ShopCLI&
I am learning the basics at University and would like some help with the following error from Eclipse : "The method getCost() is undefined for the type ShopCLI" &
"Exception in thread "main" java.lang.Error: Unresolved compilation problem:
The method getCost() is undefined for the type ShopCLI
at components.ShopCLI.main(ShopCLI.java:39)
这是我的代码
public class ShopCLI {
public static void main(String[] args) {
ArrayList<Order> ord = new ArrayList<>();
System.out.println("Welcome to Sandwich Shop CLI V1!");
System.out.println("Please Choose and Option by Typing the Appropriate Number from the List");
System.out.println("1.New Order");
Scanner sc = new Scanner(System.in);
int choice = sc.nextInt();
System.out.println("Please Choose an Outer From the List: ");
System.out.println("Press 1 to Continue or 2 to Exit");
int Sandwich = sc.nextInt();
System.out.println("Outer Options are Bun, Bread or Brioche");
String inputOuter = sc.next();
System.out.println("Inner Options are Ham, Cheese or Cucumber");
String inputInner = sc.next();
System.out.println("Sauce Options are Mayo, Butter or Marmite");
String inputSauce = sc.next();
if (Sandwich == 1){
ord.add(new Order(1, inputOuter, inputInner, inputSauce, 0));
System.out.println("You Made a " + inputInner + " with " + inputSauce + " Sandwich on " + inputOuter);
System.out.println("This Will Cost " + getCost());
}
else if (Sandwich == 2){
System.out.println("Exited.");
}
}
}
public class Sandwich {
//Fields
ArrayList<Sandwich> sandwich = new ArrayList<>();
String outer;
String inner;
String sauce;
//Constructor
public Sandwich(String outer, String inner, String sauce){
this.outer = outer;
this.inner = inner;
this.sauce = sauce;
}
//Methods
public String getOuter(){
return outer;
}
public String getInner(){
return inner;
}
public String getSauce(){
return sauce;
}
public void setOuter(String repOuter){
outer = repOuter;
}
public void setInner(String repInner){
inner = repInner;
}
public void setSauce(String repSauce){
sauce = repSauce;
}
public void createSandwich(String outer, String inner, String sauce){
sandwich.add(new Sandwich(outer, inner, sauce));
}
public void setSandwich(String repOuter, String repInner, String repSauce){
outer = repOuter;
inner = repInner;
sauce = repSauce;
}
public void resetOrder(){
sandwich.removeAll(sandwich);
}
}
public class Order extends Sandwich {
//Fields
int OrderId;
double Cost;
//Constructor
public Order(int OrderId, String outer, String inner, String sauce, int Cost) {
super(outer, inner, sauce);
this.OrderId = OrderId;
this.Cost = Cost;
}
//Methods
public int getOrderId(){
return this.OrderId;
}
public double getCost(){
return this.Cost;
}
public void setOrderId(int repOrderID){
this.OrderId = repOrderID;
}
public void overrideCost(int Cost){
this.Cost = Cost;
}
public void setOrder(int repOrderId, String repOuter, String repInner, String repSauce){
this.OrderId = repOrderId;
this.outer = repOuter;
this.inner = repInner;
this.sauce = repSauce;
double calcCost;
double outerCost = 0;
double innerCost = 0;
double sauceCost = 0;
//Outer Cost
if(repOuter == "Bun")
{
outerCost = 0.5;
}
else if(repOuter == "Bread")
{
outerCost = 0.25;
}
else if(repOuter == "Brioche")
{
outerCost = 0.75;
}
else
{
System.out.println("Invalid Bread Type");
}
//Inner cost
if(repInner == "Ham")
{
innerCost = 0.5;
}
else if(repInner == "Cheese")
{
innerCost = 0.25;
}
else if(repInner == "Cucumber")
{
innerCost = 0.75;
}
else
{
System.out.println("Invalid Filling Type");
}
//Sauce Cost
if(repSauce == "Mayo")
{
sauceCost = 0.5;
}
else if(repSauce == "Butter")
{
sauceCost = 0.25;
}
else if(repSauce == "Marmite")
{
sauceCost = 0.75;
}
else
{
System.out.println("Invalid Sauce Type");
}
calcCost = outerCost + innerCost + sauceCost;
this.Cost = calcCost;
}
}
推荐答案
getCost
方法在订单类中定义,而不在 ShopCLI
类中定义。所以你的代码:
getCost
method is defined in order class and not in ShopCLI
class. So your code:
ord.add(new Order(1, inputOuter, inputInner, inputSauce, 0));
System.out.println("You Made a " + inputInner + " with " + inputSauce + " Sandwich on " + inputOuter);
System.out.println("This Will Cost " + getCost());
应更改为
Order order = new Order(1, inputOuter, inputInner, inputSauce, 0);
ord.add(order);
System.out.println("You Made a " + inputInner + " with " + inputSauce + " Sandwich on " + inputOuter);
System.out.println("This Will Cost " + order.getCost());
^^^^^
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