Server.java

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.URISyntaxException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

/**
 * Created by yasin_000 on 1.5.2019.
 */
public class Server {
    public static void main(String[] args) throws IOException, URISyntaxException {
        Socket socket = createSocketForServer(4999);
        System.out.println("Client Connected");
        final InputStream socketInputStream = socket.getInputStream();
        byte[] buffer = new byte[40 * 1024];
        socketInputStream.read(buffer, 0, buffer.length);

        File file;
        Path path = Paths.get("imageeeeee.jpg");
        if (Files.exists(path)) file = new File(path.toString());
        else  {
            Files.createFile(path.getFileName());
            file =new File(path.toString());
        }

        Utils.bytesToFile(buffer, file);
    }
    
    private static Socket createSocketForServer(int port) {
        Socket serverSocket = null;
        try {
            serverSocket = new ServerSocket(port).accept();
        } catch (IOException e) {
            e.printStackTrace();
            System.err.println(e.getMessage());
        }
        return serverSocket;
    }
}