Image transform over network

Question

I used following code for JPG image transfer
sender :
Socket client=new Socket("localhost",4444);
           FileInputStream fis = new FileInputStream("C:/abc.jpg");
          byte[] buffer = new byte[fis.available()];
          fis.read(buffer);
          ObjectOutputStream oos = new ObjectOutputStream(client.getOutputStream()); //get the socket output stream
          oos.writeObject(buffer);
reciever:
ObjectInputStream ois = new ObjectInputStream(Client.getInputStream());
                byte[] buffer = (byte[])ois.readObject();
                FileOutputStream fos = new FileOutputStream("C:/pqr.jpg");
                fos.write(buffer);I m sucessful transfering the file but the the image does not open.
Erroor is no preview available.
What is the prob?

Answer 1

In the sender:
You need to read the entire file. The available() method tells you how much can be read in one opportunity, but there are more bytes to be read from that file.
There is no need to serialize it, those bytes can be written over the outputstream directly. This is a lot better in terms of performance.
And flush your outputstream to be sure that there are no more bytes waiting to get out
OutputStream out = client.getOutputStream();
byte[] buffer = new byte[8192];
int bytesRead;
while ((bytesRead = fis.read(buffer)) > 0) {
    out.write(buffer, 0, bytesRead);
out.flush(); // Very important
fis.close(); // Also very importantAt the receiver:
The same advice
InputStream in = client.getInputStream();
byte[] buffer = new byte[8192];
int bytesRead;
while ((bytesRead = in.read(buffer)) > 0) {
    fos.write(buffer, 0, bytesRead);
fos.flush(); // Very important
fos.close(); // Also very important
// here you might close your socket