0

好的，基本上我正在创建一家提供以下选项的酒店

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");
  • 现在，我可以进行查看、添加客户、显示空房间和删除”。
  • 但是，我刚刚意识到我不能添加多个客户。该代码将简单地将具有相同名称的客户分配给所选的每个房间。

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。房间 2 和房间 3 表明它被丹尼斯占用。- 我知道为什么，因为 String 客户只能存储一个信息。

我觉得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？因为我试图将 Customer 作为一个数组使用并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]);

        }
    }
}
4

2 回答 2

1

您的问题的原因是您没有为每个新条目实例化该类。我很抱歉，但这个问题有太多根本性的错误。您需要做的只是定义 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/使用它们。

你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);
    }
}
于 2013-03-02T19:54:10.793 回答
0

您的代码似乎有点不正确。查看添加客户代码。无论您在哪里添加客户，它也会添加到索引零。:)

 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]);
        }

    }
}
于 2014-05-15T06:25:50.103 回答