如何在Java中的多客户端/服务器应用程序中查找所有已连接客户端的IP地址？

Question

i have created a simple multi-client/server app in java. and i want to get the list of all connected clients. how can i get the ip address of all connected clients? i referred and tried code on this creating simple client/server app link for creating simple app

server Code:

public class ChatServer implements Runnable
{ 
      private ServerSocket     server = null;
      private Thread           thread = null;
      private ChatServerThread client = null;

      public ChatServer(int port)
      {  try

         {  System.out.println("Binding to port " + port + ", please wait  ...");
            server = new ServerSocket(port);  
            System.out.println("Server started: " + server);
            start();
         }
         catch(IOException ioe)
         {  System.out.println(ioe); }

      }
     public void run()
     {  while (thread != null)
        {  try
           {  System.out.println("Waiting for a client ..."); 
              addThread(server.accept());
           }
           catch(IOException ie)
           {  System.out.println("Acceptance Error: " + ie); }
         }
     }

    public void addThread(Socket socket)
    {   System.out.println("Client accepted: " + socket);
        client = new ChatServerThread(this, socket);
        try
        {  client.open();
           client.start();
        }
        catch(IOException ioe)
        {  System.out.println("Error opening thread: " + ioe); }
    }

    public void start()                  
    public void stop()                    
    public static void main(String args[])

}

any help will be appreciated.

Answer 1

If you only want to print the addresses out, simply change:

System.out.println("Client accepted: " + socket);

To:

System.out.println("Client accepted: " + socket.getRemoteSocketAddress().toString());

If you want to keep a list of connected clients, simply add socket.getRemoteSocketAddress() to an ArrayList , or whatever data structure you like the most.