nbclientsocket.html

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<TITLE>Creating a Non-Blocking Socket
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  <h3>
    e173.  
    Creating a Non-Blocking Socket</h3>

This example shows how to create a non-blocking socket.  A
non-blocking socket requires a socket channel.

<P>
See also <a href="../java.nio/NbClient.html" class="eglink"><font size="-1"><b>e176</b> Using a Selector to Manage Non-Blocking Sockets</font></a>.
 

<pre>
    // Creates a non-blocking socket channel for the specified host name and port.
    // connect() is called on the new channel before it is returned.
    public static SocketChannel createSocketChannel(String hostName, int port) throws IOException {
        // Create a non-blocking socket channel
        SocketChannel sChannel = SocketChannel.open();
        sChannel.configureBlocking(false);
    
        // Send a connection request to the server; this method is non-blocking
        sChannel.connect(new InetSocketAddress(hostName, port));
        return sChannel;
    }
</pre>


<pre>
    // Create a non-blocking socket and check for connections
    try {
        // Create a non-blocking socket channel on port 80
        SocketChannel sChannel = createSocketChannel(<font color="#0066ff"><i>"hostname.com"</i></font>, <font color="#0066ff"><i>80</i></font>);
    
        // Before the socket is usable, the connection must be completed
        // by calling finishConnect(), which is non-blocking
        while (!sChannel.finishConnect()) {
            // Do something else
        }
        // Socket channel is now ready to use
    } catch (IOException e) {
    }
</pre>
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            &nbsp;Related Examples
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e174. <a class="eglink" href="ReadSocket.html?l=rel">
    Reading from a SocketChannel
</a>
<br>

e175. <a class="eglink" href="WriteSocket.html?l=rel">
    Writing to a SocketChannel
</a>
<br>

e176. <a class="eglink" href="NbClient.html?l=rel">
    Using a Selector to Manage Non-Blocking Sockets
</a>
<br>

e177. <a class="eglink" href="NbServerSocket.html?l=rel">
    Creating a Non-Blocking Server Socket
</a>
<br>

e178. <a class="eglink" href="AcceptSocket.html?l=rel">
    Accepting a Connection on a ServerSocketChannel
</a>
<br>

e179. <a class="eglink" href="NbServer.html?l=rel">
    Using a Selector to Manage Non-Blocking Server Sockets
</a>
<br>

e180. <a class="eglink" href="DetectClosed.html?l=rel">
    Detecting When a Non-Blocking Socket Is Closed by the Remote Host
</a>
<br>


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        See also: 
<a class="eglink" href="/egs/java.nio/pkg.html?l=rel#Byte%20Buffers">
    Byte Buffers
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.nio/pkg.html?l=rel#File%20Locking">
    File Locking
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.nio/pkg.html?l=rel#Files">
    Files
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.nio/pkg.html?l=rel#Streams">
    Streams
</a>&nbsp;&nbsp;

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