Java Socket Fehler beim Senden und Empfangen

Question

Ich habe ein wirklich seltsames Problem, wenn ich eine Nachricht vom Server/Client an Server/Client senden, werden sie nicht in der Konsole gesendet. Ich habe den ganzen Tag versucht, es zu reparieren und googelte es vor, wie man es repariert, aber ich kann keine Antwort für mein Problem finden, deshalb frage ich es hier.

My Code: 

Serversocket: 
package me.jackboyplay.sockets_server; 

import java.io.IOException; 
import java.net.ServerSocket; 
import java.util.logging.Level; 
import java.util.logging.Logger; 

/** 
* 
* @author JackboyPlay 
*/ 
public class Server { 

    public static void main(String[] args) { 
     ServerSocket socket = null; 
     try { 
      socket = new ServerSocket(1243); 
      System.out.println("Gestartet..."); 
     } catch (IOException ex) { 
      Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex); 
     } 
     if(socket == null){ 
      System.out.println("NULL -> Aus"); 
      return; 
     } 
     while(true){ 
      try { 
       new Clients(socket.accept()).start(); 
      } catch (IOException ex) { 
       Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex); 
      } 
     } 
    } 

} 

    package me.jackboyplay.sockets_server; 

import java.io.DataInputStream; 
import java.io.IOException; 
import java.io.PrintStream; 
import java.net.Socket; 
import java.util.logging.Level; 
import java.util.logging.Logger; 

/** 
* 
* @author JackboyPlay 
*/ 
public class Clients extends Thread{ 

    Socket socket; 
    DataInputStream dis; 
    PrintStream dos; 

    public Clients(Socket socket){ 
     this.socket = socket; 
     try { 
      dis = new DataInputStream(socket.getInputStream()); 
      dos = new PrintStream(socket.getOutputStream()); 
     } catch (IOException ex) { 
      Logger.getLogger(Clients.class.getName()).log(Level.SEVERE, null, ex); 
     } 
    } 

    @Override 
    public void run(){ 
     System.out.println("Thread started..."); 
     String receive = null; 
     while(true){ 
      try { 
       receive = dis.readLine(); 
      } catch (IOException ex) { 
       Logger.getLogger(Clients.class.getName()).log(Level.SEVERE, null, ex); 
      } 
      if(receive != null){ 
       System.out.println(receive); 
       dos.println("Out"); 
       dos.flush(); 
      } 
     } 
    } 

} 
Client: 

    package me.jackboyplay.sockets_client; 

import java.io.DataInputStream; 
import java.io.IOException; 
import java.io.PrintWriter; 
import java.net.Socket; 
import java.util.Scanner; 
import java.util.logging.Level; 
import java.util.logging.Logger; 

/** 
* 
* @author JackboyPlay 
*/ 
public class Client { 

    public static void main(String[] args) throws IOException { 
     Socket socket = null; 
     try { 
      socket = new Socket("localhost", 1243); 
     } catch (IOException ex) { 
      Logger.getLogger(Client.class.getName()).log(Level.SEVERE, null, ex); 
     } 
     if(socket == null){ 
      return; 
     } 
     DataInputStream dis = null; 
     PrintWriter dos = null; 
     try { 
      dis = new DataInputStream(socket.getInputStream()); 
      dos = new PrintWriter(socket.getOutputStream()); 
     } catch (IOException ex) { 
      Logger.getLogger(Client.class.getName()).log(Level.SEVERE, null, ex); 
     } 
     String receive = null; 
     while(true){ 
      Scanner s = new Scanner(System.in); 
      try { 
       receive = dis.readLine(); 
      } catch (IOException ex) { 
       Logger.getLogger(Client.class.getName()).log(Level.SEVERE, null, ex); 
      } 
      if(receive != null){ 
       dos.println("Hallo"); 
       dos.flush(); 
       try { 
        receive = dis.readLine(); 
       } catch (IOException ex) { 
        Logger.getLogger(Client.class.getName()).log(Level.SEVERE, null, ex); 
       } 
       System.out.println(receive); 
      } 
     } 
    } 

} 

Answer 1

Beide Enden beginnen mit dem Empfang von der Steckdose. Du bist festgefahren. Überdenken Sie Ihr Anwendungsprotokoll