fileReciever.java

package Client;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.Socket;

public class fileReciever {
    public static void main(String[] args) {
        try {
            Socket sock = new Socket("127.0.0.1", 10001);
            DataOutputStream dos = new DataOutputStream(sock.getOutputStream());
            DataInputStream dis = new DataInputStream(sock.getInputStream());


            String fileName = "cake.mp3";

            dos.writeUTF(fileName);

            FileOutputStream fos = new FileOutputStream("D:\\save\\" + fileName);

            int readCount = 0;
            byte[] buffer = new byte[8192];

            long start = System.currentTimeMillis();

            while((readCount = dis.read(buffer)) != -1) {
                fos.write(buffer, 0, readCount);
            }

            long end = System.currentTimeMillis();
            System.out.println("[8192] Saved Safely! : " + (end - start) + "ms");

            /*while(true) {
                int data = dis.read();
                if(data == -1) break;
                fos.write(data);
            }*/

            dos.close();
            dis.close();
            fos.close();
            sock.close();

        } catch(IOException e) {
            e.printStackTrace();
        }
    }
}

fileSender.java

package Server;


import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;

public class fileSender {
    public static void main(String[] agrs) {
        try {
            ServerSocket servSock = new ServerSocket(10001);
            Socket sock = servSock.accept();

            DataOutputStream dos = new DataOutputStream(sock.getOutputStream());
            DataInputStream dis = new DataInputStream(sock.getInputStream());

            String fileName = dis.readUTF();
            FileInputStream fis = new FileInputStream("D:\\out\\" + fileName);

            int readCount = 0;
            byte[] buffer = new byte[8192];

            while((readCount = fis.read(buffer)) != -1) {
                dos.write(buffer, 0, readCount);
            }


            /*while(true) {
                int data = fis.read();
                if(data == -1) break;
                dos.write(data);
            }*/

            fis.close();
            dos.close();
            dis.close();
            sock.close();
            servSock.close();
        } catch(IOException e) {
            e.printStackTrace();
        }
    }
}