Hey,

been gone for awhile due to school and work and in the absence I switched from C++ and Java, currently working under netbeans. Was wondering if anyone knows tutorials on doing stream socket connections using Java, googled but couldn't seem to find a half-way decent one. Thanks for any help

A simple illustration:

[code]
import java.net.*;
import java.io.*;

public class Demo
{
      public Demo(String server, int port)
      {
              Socket s = new Socket(server, port);
              DataInputStream data_in = new DataInputStream(s.getInputStream());
              DataOutputStream data_out = new DataOutputStream(s.getOutputStream());
             
      }
}

[/code]

Perhaps this helps, since you know C++ it shouldn't be a problem, but it might be a bit too basic

http://java.sun.com/docs/books/tutorial/networking/sockets/

I should also note that my above code does not catch Exceptions

Yeah, it's really as simple as that code there.

If you want to see a real example, have a look at JavaOp's code.  But I took most of my connection code from the above tutorial.

You use the Socket class and create a new socket.  java.net* is the import i believe?  Also make 2 more varibles for your data in/out.  There are special Classes for these varibles but can't think of them off the top of my head.

There are multiple options:

You could use a Reader and Writer to read from the socket:

[code]

import java.io.BufferedReader;
import java.io.PrintWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.Socket;

...

Socket s = new Socket("url", port);
BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));
PrintWriter pw = new PrintWriter(new OutputStreamWriter(s.getOutputStream()));

[/code]

Or you can encapsulate the inputstream in another stream type:

[code]

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.Socket;

...

Socket s = new Socket("useast.battle.net", 6112);
DataInputStream dis = new DataInputStream(s.getInputStream());
DataOutputStream dos = new DataOutputStream(s.getOutputStream());

[/code]

Whichever suits you more - another approach is using the java.nio package, and use Buffers and Channels (which my bot does) - but this is a little bit more complicated

I don't know about 1.5, but I strongly advise against using java.nio.

Any particular reason why? It's working just fine with my bot, and I'm using 1.4.2

I would advise against using a Reader/Writer for a binary connection.  They try to interpret the stream and that just breaks stuff.

The original poster didn't ask for a Binary Connection in specific.

In that case I'd either choose a DataInputStream and DataOutputStream, or my current setup with a SocketChannel and ByteBuffer

[quote author=TangoFour link=topic=8898.msg85325#msg85325 date=1098262364]
Any particular reason why? It's working just fine with my bot, and I'm using 1.4.2
[/quote]

It's really buggy when going cross platform, and even in some of the nonblocking stuff, too.

[quote author=TangoFour link=topic=8898.msg85524#msg85524 date=1098383546]
The original poster didn't ask for a Binary Connection in specific.

In that case I'd either choose a DataInputStream and DataOutputStream, or my current setup with a SocketChannel and ByteBuffer
[/quote]

He also didn't ask for a non-binary connection.  I spent a very long time trying to figure out why I couldn't download .jpg files over http on every computer, and it turned out it was because I was using a InputReader instead of a InputStream.  I'd recommend that everybody watches out for that, it's a pain to track down.

Yes, DataInputStream would also work well.

[quote author=iago link=topic=8898.msg85556#msg85556 date=1098393478]

He also didn't ask for a non-binary connection. 
[/quote]

True

[quote author=iago link=topic=8898.msg85518#msg85518 date=1098379723]
I would advise against using a Reader/Writer for a binary connection.  They try to interpret the stream and that just breaks stuff.

[/quote]

Ha.  I spent hours upon hours trying to figure out what was wrong with my code, and all along I had been using an InputStreamReader.

[quote author=The-FooL link=topic=8898.msg85961#msg85961 date=1098656295]
[quote author=iago link=topic=8898.msg85518#msg85518 date=1098379723]
I would advise against using a Reader/Writer for a binary connection.  They try to interpret the stream and that just breaks stuff.

[/quote]

Ha. I spent hours upon hours trying to figure out what was wrong with my code, and all along I had been using an InputStreamReader.
[/quote]

Me too :(