import java.net.*;
import java.io.*;

public class ServerP
{
public static void main(String args[]) throws Exception
{
    ServerSocket soc=new ServerSocket(6661, 1);
    System.out.println("Server started (6661)");

    {
        System.out.println("Waiting...");
        soc.accept();
        System.out.println("Connection accepted");
    }
  }
}

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;

public class RapsodiaClient {

  public static void main(String[] args) {
   String server = "127.0.0.1";
    int port = 6667;
    String user = "user";
    String pass = "pass";

    FTPClient ftpClient = new FTPClient();
    try {
        System.out.println("Checkpoint 1");
        ftpClient.connect(server, 6661);
        System.out.println("Checkpoint 2");
        ftpClient.login(user, pass);
        ftpClient.enterLocalPassiveMode();
        ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
        System.out.println("Checkpoint 3");
        // APPROACH #1: using retrieveFile(String, OutputStream)
        String remoteFile1 = "C://Users//C92//Desktop//VV.wav";
        File downloadFile1 = new File("C://Users//C92//Desktop//output.wav");
        OutputStream outputStream1 = new BufferedOutputStream(new FileOutputStream(downloadFile1));
        System.out.println("Checkpoint 4");
        boolean success = ftpClient.retrieveFile(remoteFile1, outputStream1);
        System.out.println("Checkpoint 5");
        outputStream1.close();
        System.out.println("Checkpoint 6");
        if (success) {
            System.out.println("File #1 has been downloaded successfully.");
        }

    } catch (IOException ex) {
        System.out.println("Error: " + ex.getMessage());
        ex.printStackTrace();
    } finally {
        try {
            if (ftpClient.isConnected()) {
                ftpClient.logout();
                ftpClient.disconnect();
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        }
     }
   }
 }