Resposta servidor java

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Pessoal, boa tarde!
Preciso de uma ajuda, estou montando um servidor , consigo enviar uma informação para ele , porém, não consigo receber resposta do mesmo.
Como eu faria esse retorno do meu servidor java?

import java.io.BufferedInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;

public class Server {
    
    private int porta;
    public Server(int porta){
        this.porta=porta;
    }
    
    public void setServer() throws IOException, InterruptedException{
    String sProce="";
    String sFimTarefa="";
    String capitalized;
    String clientSentence;
    for(;;){
         String strFileContentes = "";
          
          ServerSocket servidor = new ServerSocket(this.porta);
          System.out.println("Hefesto ------- 1.0.0");
          System.out.println("Porta de conexão aberta");
          
          Socket cliente = servidor.accept();
          
          System.out.println("Conexão remota feita pelo cliente" + 
            cliente.getInetAddress().getHostAddress());
          
                   
          BufferedInputStream in = new BufferedInputStream(cliente.getInputStream());
          byte[] contentes = new byte['?'];
          
          int byteread = 0;
          while ((byteread = in.read(contentes)) != -1)
          {
            strFileContentes = strFileContentes + new String(contentes, 0, byteread);
            strFileContentes = strFileContentes.replaceAll("(\\r|\\n)", "");
          }
          Runtime runtime = Runtime.getRuntime();
          int op = Integer.parseInt(strFileContentes);
          if (op == 1) {
            
            try
            {
              Process p1 = runtime.exec("cmd /c start C:\\Users\\diego.silva\\Desktop\\Server\\ADM.bat");
              InputStream is = p1.getInputStream();
              int i = 0;
              while ((i = is.read()) != -1) {
                System.out.print((char)i);
              }
             
            }
            catch (IOException ioException)
            {
              System.out.println(ioException.getMessage());
            }
          } else if (op == 2) {
            try
            {
              Process p1 = runtime.exec("cmd /c start E:\\Testes_Automaticos\\GRUPOA.bat");
              InputStream is = p1.getInputStream();
              int i = 0;
              while ((i = is.read()) != -1) {
                System.out.print((char)i);
              }
            }
            catch (IOException ioException)
            {
              System.out.println(ioException.getMessage());
            }
          } else if (op == 3) {
            try
            {
              Process p1 = runtime.exec("cmd /c start E:\\Testes_Automaticos\\GRUPOB.bat");
              InputStream is = p1.getInputStream();
              int i = 0;
              while ((i = is.read()) != -1) {
                System.out.print((char)i);
              }
            }
            catch (IOException ioException)
            {
              System.out.println(ioException.getMessage());
            }
          } else if (op == 4) {
            try
            {
              Process p1 = runtime.exec("cmd /c start E:\\Testes_Automaticos\\IrisWEb.bat");
              InputStream is = p1.getInputStream();
              int i = 0;
              while ((i = is.read()) != -1) {
                System.out.print((char)i);
              }
            }
            catch (IOException ioException)
            {
              System.out.println(ioException.getMessage());
            }
          } /*else if (op == 5) {
            try
            {
              Process p1 = runtime.exec("cmd /c start E:\\Testes_Automaticos\\WriteMonitoria.bat");
              InputStream is = p1.getInputStream();
              int i = 0;
              while ((i = is.read()) != -1) {
                System.out.print((char)i);
              }
            }
            catch (IOException ioException)
            {
              System.out.println(ioException.getMessage());
            }
          } else if (op == 6) {
            try
            {
              Process p1 = runtime.exec("cmd /c start E:\\Testes_Automaticos\\killProcess.bat");
              InputStream is = p1.getInputStream();
              int i = 0;
              while ((i = is.read()) != -1) {
                System.out.print((char)i);
              }
            }
            catch (IOException ioException)
            {
              System.out.println(ioException.getMessage());
            }
          }*/ else {
            System.out.println("Informação Invalida!!");
          }
          
         
         // PrintStream saida = new PrintStream(cliente.getOutputStream());
        
         
          
          servidor.close();
          cliente.close();
    }
}
}