簡單的Java Array新手

Question

我試圖自學Java，並開始瀏覽BlueJ的例子。

在手術系統的情況下，我需要將患者及其地址添加到陣列，然後才能添加患者，然後列出患者。

該示例使用向量和硬編碼向向量添加名稱，但是我想使用數組並允許用戶向數組添加名稱和地址。

任何人都可以提供一些指導？

我有以下但不知道從哪裏去。

public class Patient 
{ 
    public String name; 
    public String address; 

    public Patient(String n, String a) { 
     name = n; 
     address = a; 
    } 


} 

Answer 1

我不會給你準確的答案，因爲這看起來非常像功課，但這裏是一個示例實施一家酒店使用arr AYS。通過它並嘗試理解它;如果你這樣做，你可以自己完成病人問題。

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) 
    { 
     int numOfCustomers=10; 
     Customer[] RoomList = new Customer[numOfCustomers]; 
     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); 
    } 
} 

Answer 2

這種信息有很好的記錄here。

在你的情況，好像你要創建類型的數組Patient

用於創建可容納十名患者數組的語法是：

Patient[] patients = new Patients[10]; 

和之後閱讀文檔，你將能夠使用我提供的語法來獲得所需的功能:)