При попытке считать объект выкидывает исключение

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package servers;
 
   import java.net.ServerSocket;
    import java.net.Socket;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.BufferedReader;
import java.io.InputStreamReader;
 
 
 
/**
 *
 * @author home
 */
public class Servers {
 
 
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {
        // TODO code application logic here
        ServerSocket server = new ServerSocket (3000); //создаем сервер и слушаем порт 3000 мы сервер
    try (Socket accept = server.accept ()) {
    InputStream inputStream = accept.getInputStream();
    OutputStream outputStream = accept.getOutputStream();
    ObjectOutputStream oos = new ObjectOutputStream (outputStream);
      ObjectInputStream inputStream1 = new ObjectInputStream (inputStream);
      while (true ) {
     Person readObject = (Person ) inputStream1.readObject(); [B]- здесь ошибка [/B] Class not found Exception 
      System.out.println (readObject);
      }
    
            
    
        
        //BufferedReader bufferedReader = new BufferedReader (new InputStreamReader (inputStream, "utf8"));
        //for (int i=0; i<10; i++) { // вывести 10 строк в цикле
            //String readline = bufferedReader.readLine();
           //oos.writeUTF ("OK");
           //oos.flush();
           // System.out.println ("line="+readline);
            accept.close();
        }
        
    }}}

 import servers.Person;

 private static final long serialVersionUID = 42L;

Person readObject = (Person ) inputStream1.readObject();