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         


        

Answer 1

You need to either have the message be a fixed size, or you need to send the size or you need to use some separator characters.

This is the easiest case for a known size (100 bytes):

in = new DataInputStream(server.getInputStream());
byte[] message = new byte[100]; // the well known size
in.readFully(message);

In this case DataInputStream makes sense as it offers readFully(). If you don't use it, you need to loop yourself until the expected number of bytes is read.