같은 클래스

Question

내가 전자 메일 시스템에 대한 코드를 쓰고 있어요 내가 하나의 작은 문제가있는 메소드를 호출하는 방법, 나는 방법을 호출하는 방법을 알아낼 수 없습니다.

주요 방법에 writeAllToFile 메소드를 호출하는 올바른 방법은 무엇입니까?

/** 이 * 작성자 : 여기

/** 
* Created by Broomhead0 on 4/11/14. 
*/ 
public class User 
{ 

    public String userName; // the name of the user 
    public Mailbox outbox; // reference to the mailbox of sent messages 
    public Mailbox inbox; // reference to the mailbox of received messages 


    // create mailboxes according to the size given as input 
    public User(String o, int boxsize) { 
     userName = o; 
     outbox = new Mailbox(boxsize); 
     inbox = new Mailbox(boxsize); 
    } 

} 

가 메시지 클래스입니다 : 여기

/** 
* Created by Broomhead0 on 4/11/14. 
*/ 
import java.util.ArrayList; 
public class Userlist 
{ 
    ArrayList<User> users; //this is an arraylist that will store references to all users 

    public Userlist() 
    { 

     users = new ArrayList<User>(); 
    } 

    // find a user in the list based on the username 
    public User findUser(String username) 
    { 
     // iterate through the array; only iterate according to how many users are currently in  the array 
     for (int i = 0; i < users.size(); i++) 
     { 
      // access the particular user through users.(i), then get the name, 
      // and call the equals method on that name to compare it with the input username 
      if (users.get(i).userName.equals(username)){ 
       return users.get(i); 
      } 

     } 
     // no user found 
     return null; 
    } 

    // add a user to the list; only do so if the user does not yet exist 
    public void addUser(User u) 
    { 
     if (findUser(u.userName) != null) //if there is a match, 
      System.out.println("User already exists"); 
     else //if there is not match 
     { 
      users.add(u); //add the username 
     } 

    } 
    //check if this is correct 
    //accessors 
    public User getUser(int i){ 
     return users.get(i); 
    } 

    public int getNumUsers(){ 
     return users.size(); 
    } 


} 

은 사용자 클래스입니다 : 여기

public class MailboxSystemSol{ 

    public static void main (String args[]) throws IOException{ 
    //code is too long to post here 
    } 

    public static void writeAllToFile(Userlist ul, User u, Message me){ 
    //code is too long to post here 
    } 

} 

는 사용자 목록 클래스 Broomhead0, 4/11/14 당신은 무엇을 시도 - */

public class Message { 

    // the properties of a message 
    private String sender; 
    private String receiver; 
    private String subject; 
    private String body; 

    // all property values are known at creation of the message; so initialize 
    public Message (String s, String r, String sub, String b) 
    { 
     sender = s; 
     receiver = r; 
     subject = sub; 
     body = b; 
    } 

    // any nice format of printing the names and the values of the properties will do 
    public void printMsg() 
    { 
     System.out.println("Sender: " + sender); 
     System.out.println("Receiver: " + receiver); 
     System.out.println("Subject: " + subject); 
     System.out.println("Message: " + body); 
    } 

    // what follows are basic getter methods 

    public String getSender() 
    { 
     return sender; 
    } 

    public String getReceiver() 
    { 
     return receiver; 
    } 

    public String getSubject() 
    { 
     return subject; 
    } 

    public String getBody() 
    { 
     return body; 
    } 

} 

Answer 1

public class MailboxSystemSol{ 

    public static void main (String args[]) throws IOException{ 

     //define userlist, user and message variables.. 
     UserList userList = new UserList(); 
     User user = new User("Matthew", 1024); 
     Message message = new Message("sender@gmail.com", "receiver@gmail.com", "Subject Content", "Body Content"); 

     //do something with declared variables...    

     writeAllToFile(userList, user, message); 
    } 

    public static void writeAllToFile(Userlist ul, User u, Message me){ 
     //code is too long to post here 
    } 

}