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所以我遇到了我的代碼問題，我的循環結束後我的「C」的情況。我需要它打印出一條消息，說明商店已滿並保持循環備份並打印出主菜單。另外，當我在添加新寵物後列出所有寵物時，我的寵物3沒有被保存。我循環結束突然和Java不保存對象？
import java.util.*;
public class MainPets
{
static Scanner scan = new Scanner(System.in);
private static String Userinput;
private static void mainmenu(){
System.out.println("A."+" " + "List the pets in the store.");
System.out.println("B."+" " + "Age up the pets");
System.out.println("C."+" " + "Add a new pet");
System.out.println("D."+" " + "Adopt a pet");
System.out.println("E."+" " + "Quit");
Userinput=scan.nextLine();
}
public static String Getuserinput(){
return Userinput;
}
public static void main (String [] args){
int Pet3age;
String Pet3name;
Pet Pet1=new Pet("Fido",3);
Pet Pet2=new Pet("furball",1);
int Userinputint;
Pet Pet3=null;
System.out.println("Welcome to the pet store.Type the letter to make your selection");
MainPets.mainmenu();
while(Userinput.equals("A")||Userinput.equals("B")||Userinput.equals("C")||Userinput.equals("D")||Userinput.equals("E")){
switch(Userinput) {
case "A":
System.out.println("Fido is "+Pet1.GetAge()+ " years old and is " + Pet1.Getadoptionstatus());
System.out.println("furball is " + Pet2.GetAge()+ " years old and is " + Pet2.Getadoptionstatus());
Userinput=scan.nextLine();
case "B":
System.out.println("Everyone just got a little older.");
Pet1.ageincrease();
Pet2.ageincrease();
Userinput=scan.nextLine();
case "C":
if (Pet3!=null){
System.out.println("Sorry the store is full");
Userinput=scan.nextLine();
}/* If the Pet 3 spot has been filled I want it to print this
and loop back up to print the main menu again.*/
if(Pet3==null){
System.out.println("Please type in a name");
Pet3name=scan.nextLine();
System.out.println("Please type in an age");
Pet3age=scan.nextInt();
Pet3=new Pet(Pet3name,Pet3age);/*This line is Not saving Pet3 as
a "Pet" class and when I try to list all the pets by pressing
A when it loops back up , Pet3 does not show up as a Pet*/
Userinput=scan.nextLine();/* This is where my program just
ends.It doesn't even take a user input */
}
case "D":
//will add later on
break;
case "E":
//will add later on
break;
}
}
這裏是代碼爲我的寵物類：當Pet3!=null，因爲你沒有後採取從掃描儀的任何輸入
public class Pet {
String Name, AdoptionStatus, True = "not adopted";
int Age;
public Pet() {}
public Pet(String Name, int Age) {
this.Name = Name;
this.Age = Age;
}
public void SetName(String namesetup) {
Name = namesetup;
}
public String GetName() {
return Name;
}
public int GetAge() {
return Age;
}
public int ageincrease() {
return Age++;
}
public String Getadoptionstatus() {
return AdoptionStatus;
}
public void Setadoptionstatus(String setadoption2) {
AdoptionStatus = True;
}
}