好的，基本上我正在创建一个可以执行以下选项的酒店
System.out.println("V: To View all rooms");
System.out.println("A: To Add customer to a room");
System.out.println("E: To Display empty rooms");
System.out.println("D: To Delete customer from a room");
System.out.println("F: Find room from customer name");
System.out.println("O: View rooms alphabetically by name");
示例：如果我将名称TOM添加到房间2，然后将DENNIS添加到房间3。 2号房间和3号房间显示它被丹尼斯占领。 - 我知道为什么，因为String客户只能存储一个信息。
我有一种感觉，我需要将客户更改为数组。
（请记住，我不想使用ArrayList）。
SO：我的问题是，我该如何解决这个问题？因为我试图与客户一起作为一个数组而且我破坏了整个编码（感谢本地历史还原！）
代码：
package testroom;
import java.util.*;
public class TestRoom{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
String Customer = null;
int roomNum = 1;
String Option;
String[] hotel = new String[12];
initialise(hotel);
while ( roomNum < 11 )
{
System.out.println("Hotel Booking Options");
System.out.println("V: To View all rooms");
System.out.println("A: To Add customer to a room");
System.out.println("E: To Display empty rooms");
System.out.println("D: To Delete customer from a room");
System.out.println("F: Find room from customer name");
System.out.println("O: View rooms alphabetically by name");
Option = input.next();
if (Option.equals("V")){ //viewing all rooms
view(hotel, Customer);
}
if (Option.equals("A")){ // adding a customer to a room
System.out.println("Enter room number(1-10)");
roomNum =input.nextInt();
System.out.println("Enter name for room " + roomNum + " : " ) ;
Customer = input.next();
hotel[roomNum] = Customer ;
add(hotel, Customer);
System.out.println(" ");
}
if (Option.equals("E")){ //view all empty rooms
vacant(hotel, Customer); //links to private static void empty
}
if (Option.equals("D")){ //Deletes a customer from a room
//Searches if room is occupied, if it is then it will delete customer from that room
view(hotel, Customer);
System.out.println("Enter the room which you want to delete a customer from: ");
roomNum = input.nextInt();
hotel[roomNum] = "empty";
delete(hotel, Customer);
System.out.println("");
}
if (Option.equals("F")){ //view all empty rooms
find(hotel); //links to private static void empty
}
}
}
private static void initialise( String hotelRef[] )
{
for (int x = 1; x < 11; x++ )
hotelRef[x] = "empty";
System.out.println( "Welcome to The Plaza");
}
public static void view(String hotel[], String Customer){
for (int x =1; x <11; x++)
{
int z=0;
String Customername = Customer;
hotel[z]= Customername;
if (hotel[x].equals("empty"))
System.out.println("room " + x + " is empty");
else {
System.out.println("room " + x + " is occupied by "+ hotel[z]);
}
}
}
private static void add(String hotel[], String Customer){
for (int x =1; x <11; x++)
{
int z=0;
String Customername = Customer;
hotel[z]= Customername;
if (hotel[x].equals("empty"))
System.out.println("room " + x + " is empty");
else {
System.out.println("room " + x + " is occupied by "+ hotel[z]);
}
}
}
private static void vacant(String hotel[], String Customer){
for (int x = 1; x < 11; x++ )
{
int z=0;
String Customername = Customer;
hotel[z]= Customername;
if (hotel[x].equals("empty")) //if statement
System.out.println("room " + x + " is empty");
}
}
private static void delete(String hotel[], String Customer){ //link to this when pressed the D key
//view (hotel);
for (int x = 1; x < 11; x++ )
{
int z=0;
String Customername = Customer;
hotel[z]= Customername;
if (hotel[x].equals("empty"))
{
System.out.println("room " + x + " is empty");
}
else {
System.out.println("room " + x + " occupied by " + hotel[x]);
}
}
}
private static void find(String hotel[]){
Scanner input = new Scanner(System.in);
System.out.println("Enter customer name for room:" );
String customersname;
customersname = input.next(); //stores name they enter as customers name
for (int x = 0; x < 10; x++ )
{
if (hotel[x].equals(customersname))
System.out.println("room " + x + " is occupied by "+hotel[x]);
}
}
}
答案 0 :(得分：1)
您遇到问题的原因是您没有为每个新条目实例化该类。对不起，这个问题根本就有太多错误。您需要做的就是定义Customer类及其数据成员和数据访问函数，然后根据需要创建新对象，并完全从另一个类填充/利用它们。
您可以尝试这样的事情：
import java.util.*;
class Customer
{
private String name;
private int room;
public void setName(String name)
{
this.name=name;
}
public String getName()
{
return this.name;
}
public void setRoom(int room)
{
this.room=room;
}
public int getRoom()
{
return this.room;
}
}
class Hotel
{
public static void initialize(Customer RoomList[])
{
for(int i=0; i<RoomList.length; i++)
{
RoomList[i]=new Customer();
RoomList[i].setName("EMPTY");
RoomList[i].setRoom(i+1);
}
}
public static void viewList(Customer RoomList[])
{
for(int i=0; i<RoomList.length; i++)
{
if(RoomList[i].getName()=="EMPTY")
System.out.println("Room number "+RoomList[i].getRoom()+" is vacant.");
else
System.out.println("Room number "+RoomList[i].getRoom()+" is ocupied by "+RoomList[i].getName()+".");
}
System.out.println();
}
public static boolean addCustomer(Customer RoomList[], String name)
{
for(int i=0; i<RoomList.length; i++)
if(RoomList[i].getName().equals("EMPTY"))
{
RoomList[i].setName(name);
return true;
}
return false;
}
public static void showEmptyRooms(Customer RoomList[])
{
System.out.println("Available rooms are:");
for(int i=0; i<RoomList.length; i++)
if(RoomList[i].getName()=="EMPTY")
System.out.println(RoomList[i].getRoom());
System.out.println();
}
public static boolean deleteCustomer(Customer RoomList[], String name)
{
for(int i=0; i<RoomList.length; i++)
if(RoomList[i].getName().equals(name))
{
RoomList[i].setName("EMPTY");
System.out.println("Deletion successful.\n");
return true;
}
return false;
}
public static int getIndex(Customer RoomList[], String name)
{
for(int i=0; i<RoomList.length; i++)
if(RoomList[i].getName().equals(name))
return i;
return -1;
}
public static void main(String[] args)
{
Customer[] RoomList = new Customer[12];
String name;
initialize(RoomList);
Scanner input = new Scanner(System.in);
int option=0;
do
{
System.out.println(" Hotel Booking Options");
System.out.println("=====================================");
System.out.println("1: To View all rooms");
System.out.println("2: To Add customer to a room");
System.out.println("3: To Display empty rooms");
System.out.println("4: To Delete customer from a room");
System.out.println("5: Find room from customer name");
System.out.println("0: Exit");
System.out.print("\nEnter your choice: ");
option = input.nextInt();
System.out.println();
switch(option)
{
case 1:
{
viewList(RoomList);
break;
}
case 2:
{
System.out.print("Customer's name: ");
name=input.next();
System.out.println();
if(!addCustomer(RoomList, name))
System.out.println("No rooms available!");
break;
}
case 3:
{
showEmptyRooms(RoomList);
break;
}
case 4:
{
System.out.print("Customer's name: ");
name=input.next();
System.out.println();
deleteCustomer(RoomList, name);
break;
}
case 5:
{
System.out.print("Customer's name: ");
name=input.next();
System.out.println();
System.out.println("Customer's room: "+RoomList[getIndex(RoomList, name)].getRoom()+"\n");
break;
}
case 0:
{
System.out.println("\nThank you!\n");
break;
}
default:
{
System.out.println("Invalid option!\n");
break;
}
}
}while(option!=0);
}
}
答案 1 :(得分：0)
您的代码似乎有点不正确。查看添加客户代码。无论您在何处添加客户，它都会增加索引零。 ：）
if (Option.equals("A")){ // adding a customer to a room
System.out.println("Enter room number(1-10)");
roomNum =input.nextInt();
System.out.println("Enter name for room " + roomNum + " : " ) ;
Customer = input.next();
hotel[roomNum] = Customer ; // adds to the room number.
add(hotel, Customer); // adds to the zero-th index.
System.out.println(" ");
}
private static void add(String hotel[], String Customer){
for (int x =1; x <11; x++)
{
int z=0;
String Customername = Customer;
hotel[z]= Customername; // this line is the culprit.
if (hotel[x].equals("empty"))
System.out.println("room " + x + " is empty");
else {
System.out.println("room " + x + " is occupied by "+ hotel[z]);
}
}
}