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package restaurantclient;
public class Restaurant extends Store {
//Instance Variables
private int peopleServed;
private double averagePrice;
//Constructor with 3 parameters
public Restaurant(String storename, int peopleServed, double averagePrice) {
super(storename);
setPeopleServed(peopleServed);
setAveragePrice(averagePrice);
}
//Getters (Accessors)
public int getPeopleServed() {
return peopleServed;
}
public double getAveragePrice() {
return averagePrice;
}
//Setters (Mutators)
public void setPeopleServed(int peopleServed) {
this.peopleServed = peopleServed;
}
public void setAveragePrice(double averagePrice) {
this.averagePrice = averagePrice;
}
//toString Method [Must Override]
@Override
public String toString() {
String information = "Store name: " + (super.getName());
information += "\n" + "The number of people served: " + peopleServed;
information += "\n" + "The average price per person: $" + averagePrice;
return information;
}
//Equals Method
@Override
public boolean equals (Object other) {
if (this == other)
return true;
if (other == null)
return false;
if (!(other instanceof Restaurant))
return false;
Restaurant otherRestaurant = (Restaurant) other;
if (this.getName() == null) {
if (otherRestaurant.getName() != null)
return false;
} else if (!(this.getName().equals(otherRestaurant.getName())))
return false;
if (peopleServed == -1) {
if (otherRestaurant.peopleServed != -1)
return false;
} else if (peopleServed != (otherRestaurant.peopleServed))
return false;
if (averagePrice == -1) {
if (otherRestaurant.averagePrice != -1)
return false;
}
else if (averagePrice != (otherRestaurant.averagePrice))
return false;
return true;
}
public double getAverageTaxes() {
double total;
total = this.getPeopleServed() * this.getAveragePrice()
* super.CA_TAX_RATE;
return total;
}
}
package restaurantclient;
public class Store {
//Instance Variables
protected final double CA_TAX_RATE = 0.0884;
private String storename;
//Constructor
public Store(String storename) {
setName(storename);
}
//Getters (Accessors)
public String getName() {
return storename;
}
//Setters (Mutators)
public void setName(String storename) {
this.storename = storename;
}
//toString Method [Must Override]
@Override
public String toString() {
String directory = "Name of store: " + storename;
return directory;
}
//Equals Method
public boolean equals (Store storename) {
if (this == storename)
return true;
if (storename == null)
return false;
if (!(storename instanceof Store))
return false;
return true;
}
}
以上是equals方法我打電話方法不行爲。它們顯示錯誤的答案：它應該是在一審，「他們是不是等於」，並在設定的一切彼此相等後的第二個實例，它應該顯示，「他們都是平等的」。我非常努力地解決這個問題，許多事情都沒有奏效。沒有明顯的錯誤它運行良好，但我做錯了什麼，一些精確的指導將有很大的幫助。大部分含糊的提示讓我無處可尋。如果這對你有幫助，我需要一些具體的東西。再次感謝您的幫助。以下是客戶端類：的Java等於預期
package restaurantclient;
public class RestaurantClient {
public static void main(String[] args) {
Restaurant r1 = new Restaurant("McDonald's", 1000000, 8.00);
Restaurant r2 = new Restaurant("KFC", 500000, 6.00);
System.out.println(r1.toString());
System.out.println(r2.toString());
System.out.println();
r2.setAveragePrice(r1.getAveragePrice());
r2.setPeopleServed(r1.getPeopleServed());
System.out.println(r1.toString());
System.out.println(r2.toString());
if (r1.equals(r2)) {
System.out.println("The objects are equal.");
}
else {
System.out.println("The objects are not equal."); //SHOULD say "not equal" here EVERY TIME the second instance (next comment down) says "Equal"...this should never change.
System.out.println();
}
System.out.println();
r2.setName(r1.getName());
System.out.println(r1.toString());
System.out.println(r2.toString());
if (r1.equals(r2)) {
System.out.println("The objects are equal."); //Now that everything is equal, it should print "The Objects are Equal" but it doesn't. It's in lock-step with the previous instance. Changing some things like return true to return false might make both these instances "Are equal" and some might change them to "Not Equal" but they are never the way I want them, which is when 2 changes are made, they are not equal (first case) and when the third and final change is made (like this case here on this line) it should say "the obj are equal" but it doesn't.
}
else {
System.out.println("The objects are not equal.");
System.out.println();
}
System.out.println();
System.out.print("The avg. annual taxes paid by the restaurant is: $");
System.out.println(r1.getAverageTaxes());
}
}
什麼是輸入輸出？第一眼看起來很好！ –
等於方法使用的名稱，人們服務和平均價格...與該標準mcDonalds和kfc必須在等於方法返回false ... –
是否有你使用'super.getName（）'的原因？ – AxelH