java - Socket send and receive byte array

Question

In server, I have send a byte array to client through Java socket

byte[] message = ... ;

DataOutputStream dout = new DataOutputStream(client.getOutputStream());
dout.write(message);

How can I receive this byte array from client?

Answer 1

Try this, it's working for me.

Sender:

byte[] message = ...
Socket socket = ...
DataOutputStream dOut = new DataOutputStream(socket.getOutputStream());

dOut.writeInt(message.length); // write length of the message
dOut.write(message);           // write the message

Receiver:

Socket socket = ...
DataInputStream dIn = new DataInputStream(socket.getInputStream());

int length = dIn.readInt();                    // read length of incoming message
if(length>0) {
    byte[] message = new byte[length];
    dIn.readFully(message, 0, message.length); // read the message
}