Java服务器 - 客户端交互

Question

我有一台可以托管多个客户端的服务器，以及一个可以连接的客户端。我正在尝试选择其中一个客户端并说，通过PrintWriter向他们发送消息。 I下面的代码仅供参考，甚至可能不需要使用。我只是想知道是否有办法向特定客户端而不是所有客户端发送消息。我不知道从哪里开始..我可以做服务器到客户端和客户端到服务器但我想将服务器到客户端的通信发送到特定的客户端

客户端：

    import java.net.Socket;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;

import javax.swing.JOptionPane;

public class Main{
    private static Socket socket;
    private static PrintWriter printWriter;
    private static String inputLine;
    private static Thread thread;

    public static void main(String[] args) {
        // System.out.println("What is the computer's IP address?");
        String Ip_addr = JOptionPane
                .showInputDialog("Enter the IP number of the server to connect: ");
        String IP = Ip_addr;
        while (true) {

            try {
                System.out.println("Client running...");
                socket = new Socket(IP, 8080);
                BufferedReader bufferedReader = new BufferedReader(
                        new InputStreamReader(socket.getInputStream()));
                while ((inputLine = bufferedReader.readLine()) != null) {
                    System.out.println(inputLine);
                    JOptionPane.showMessageDialog(null, inputLine);
                }
            } catch (Exception e) {

            }


        }
    }
}

服务器：

import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;
import java.awt.Desktop;
import java.io.BufferedReader;
import java.io.File;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.PrintWriter;
public class Main
{
    private static ServerSocket serverSocket;
    private static Socket clientSocket;
    private static BufferedReader bufferedReader;
    private static BufferedReader threadReader;
    private static String inputLine;
    private static Thread thread;
    private static PrintWriter printWriter;
    public static void main(String[] args) throws IOException
    {
        Thread cmd = new Thread(new Commands());
        cmd.start();
        while(ClientThread.Clients < 100) {
            Scanner scan = new Scanner(System.in);
            try
            {
                serverSocket = new ServerSocket(8080);
                clientSocket = serverSocket.accept();
                ClientThread.Clients += 1;

                //Desktop.getDesktop().open(new File("C:/Users/Chris/Desktop/Test.txt")); // Opens notepad on Windows.
                bufferedReader = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));

                printWriter = new PrintWriter(clientSocket.getOutputStream(),true);
            }
            catch(IOException e)
            {
                System.out.println(e.getMessage());
            }
            try{
                thread = new Thread(new ClientThread(clientSocket));
                thread.start();
            }catch(Exception e){System.out.println("Error 103 = failed to create thread."); break;}
            try{
                serverSocket.close();
            }catch(Exception e){System.out.println("Error 105 = failed to close socket.");}

        }


    }
}

多个客户的线程：

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.StringTokenizer;

public class ClientThread extends Thread{
    static Socket socket;
    BufferedReader in;
    PrintWriter out;
    String username;
    public static int Clients = 0;
    static String[] Names = new String[100];
    char EOF = (char)0x00;
    public ClientThread(Socket s){
        socket = s;
    }
    public void run(){
        try{
            in = (new BufferedReader(new InputStreamReader(socket.getInputStream())));
            out = new PrintWriter(socket.getOutputStream());
            System.out.println("Client Connected from " + socket.getInetAddress() + ", " + Clients + " connected.");
            Names[Clients-1] = "Client" + (Clients) + " " + socket.getInetAddress();
            in.readLine();
            Thread.sleep(100);
        }catch(Exception e){
            System.out.println(("Client Disconected from " + socket.getInetAddress()));
            removeClient((socket.getInetAddress()).toString());

        }


    }
    private void removeClient(String Inet) {
        int Location;
        String[] Storage = new String[Clients];
        int j = 0;
        for(int i = 0; i < Clients; i++) {
            String line = Names[i];
            StringTokenizer st = new StringTokenizer(line);
            String Name = st.nextToken();
            String IP = st.nextToken();
            if(IP.equalsIgnoreCase(Inet)) {
                //System.out.println("Client removed..");
            }else {
                Storage[j] = Names[i];
                j++;
            }
        }


        for(int i = 0; i < Clients; i++) {
            Storage[i] = Names[i];
        }

        Clients--;

    }
}

任何建议都非常感谢，提前谢谢。