TCP Connection via Java Sockets /Server-Side implementaion

Server-Side.java

/**
 * Created by Bahaa on 4/7/2018.
 */
package com.example.server;

import java.net.*;
import java.io.*;
import java.util.Base64;


public class Server {
    private static DataInputStream dataInputStream;
    private static DataOutputStream dataOutputStream;
    private static ServerSocket serverSocket;
    private static Socket socket;
    private static File mFile;
    private static FileInputStream fileInputStream;
    private static String imageDataToString;
    private static byte[] imageData;

    //TODO: Implement interrupt FLAG to close socket
    private boolean wasInterrupted;



    public static void main(String[] args) throws IOException {
        // Establishing Connection..
        serverSocket = new ServerSocket(13267);


        //TODO: Replace the condition with interrupt FLAG
            while(true) {
                System.out.println("WAITING...");
                socket = serverSocket.accept();

                System.out.println("CONNECTION ADMITTED..");
                System.out.println("CLIENT INFO: " + socket);

                dataInputStream = new DataInputStream(socket.getInputStream());
                dataOutputStream = new DataOutputStream(socket.getOutputStream());

                mFile = new File("D:\\helloworld.jpg");

                System.out.println("SENDING...");

                fileInputStream = new FileInputStream(mFile);
                imageData = new byte[(int) mFile.length()];
                fileInputStream.read(imageData);

                //Encoding byteArray into Base64 String..
                imageDataToString = encodeImageToString(imageData);
                System.out.println(imageDataToString.length());

                System.out.println(imageDataToString);
                dataOutputStream.writeUTF(imageDataToString);

                System.out.println(String.valueOf(dataOutputStream.size()));

                dataOutputStream.flush();
            }
          //  sock.close();  //Socket never closed till future interrupt FLAG received from client

    }

    /* Using Java.Util Base64 Encoder NOT "Apache Common" to avoid dependency problems..
       Android.Util Base64 Decoder can perfectly decode Java.Util Encodings,
       Unlike Apache common, Which uses different "Weired' Algorithm.
       Also: Apache Common Library causes several problems when used on Android API Level > 23
    */
    public static String encodeImageToString(byte[] imageByteArray) {
        return Base64.getEncoder().encodeToString(imageByteArray);
    }
}