cmd中的Java套接字编程

因此，我有以下代码在linux的telnet登录上运行。如何使它在cmd中运行？我尝试在cmd中运行tcp客户端和服务器程序，但没有得到输出。这是我的代码，它在linux telnet上运行，但不在Windows cmd上运行。

import java.io.*;
import java.net.*;
class tcpclient{
public static void main(String args[])throws Exception{
    String hwaddr,modsentence;
    BufferedReader inFromUser=new BufferedReader(new      InputStreamReader(System.in));
    Socket clientSocket=new Socket("localhost",2057);
    DataOutputStream outToServer= new DataOutputStream(clientSocket.getOutputStream());
    BufferedReader inFromServer=new BufferedReader(new    InputStreamReader(clientSocket.getInputStream())); 
    System.out.print("Enter Ip address");
    hwaddr=inFromUser.readLine();
    outToServer.writeBytes(hwaddr+""+"\n");
    modsentence=inFromServer.readLine();
    System.out.println("FROM SERVER:"+modsentence);
    clientSocket.close();
}
}
import java.net.*;
import java.io.*;
class tcpserver{
    public static void main(String args[])throws Exception
    {
        String clientSentence;
        ServerSocket welcomeSocket = new ServerSocket(2057);
        while(true)
        {
            Socket connectionSocket=welcomeSocket.accept();
            BufferedReader inFromClient=new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
            DataOutputStream outToClient=new DataOutputStream(connectionSocket.getOutputStream());
            clientSentence=inFromClient.readLine();
            if(clientSentence.equals("a"))
                outToClient.writeBytes("testtt");

       }
   }
}