Tranfer

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;

public class Servidor {

    public static void main(String[] args) throws Exception {
        //inicializa o servidor
        ServerSocket ssock = new ServerSocket(5000);
        //aceita conexao
        Socket socket = ssock.accept();

        //The InetAddress specification
        InetAddress IA = InetAddress.getByName("localhost");

        //especifica o arquivo
        File file = new File("TesteMusic.rar");
        // transforma o arquio em um formao que pode ser lido(stream de bytes)
        FileInputStream fis = new FileInputStream(file);
        // encapsula o fis para bis para aumentar a velocidade de transferencia
        BufferedInputStream bis = new BufferedInputStream(fis);

        //Pega o output socket para mandar para o cliente
        OutputStream os = socket.getOutputStream();

        //Inicializo o array de bytes
        byte[] contents;
        // tamanho do arquivo
        long fileLength = file.length();
        // long auxiliar para ficar vendo onde esta no arquivo
        long current = 0;

        //loop para converter arquivo para array de bytes
        while(current!=fileLength){
            // meu buffer d tamanho 10000
            int size = 10000;
            // enquanto n chega na ultima parte incrementa current
            if(fileLength - current >= size)
                current += size;
            else{
                // qnd chega na ultima parte, verfica qnt falta e coloca em size
                size = (int)(fileLength - current);
                current = fileLength;
            }
            contents = new byte[size];
            bis.read(contents, 0, size);
            os.write(contents);
            System.out.println("Sending file ... "+(current*100)/fileLength+"% complete!");
        }

        os.flush();
        //File transfer done. Close the socket connection!
        socket.close();
        ssock.close();
        bis.close();
        System.out.println("File sent succesfully!");
    }
}

import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.InetAddress;
import java.net.Socket;


public class Cliente {

    public static void main(String[] args) throws Exception{

        //Initialize socket
        Socket socket = new Socket(InetAddress.getByName("localhost"), 5000);
        byte[] contents = new byte[10000];

        //Initialize the FileOutputStream to the output file's full path.
        FileOutputStream fos = new FileOutputStream("TesteMusic2.rar");
        BufferedOutputStream bos = new BufferedOutputStream(fos);
        InputStream is = socket.getInputStream();

        //No of bytes read in one read() call
        int bytesRead = 0;

        while((bytesRead=is.read(contents))!=-1)
            bos.write(contents, 0, bytesRead);

        bos.flush();
        socket.close();

        System.out.println("File saved successfully!");
    }
}