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<TITLE>Creating a Non-Blocking Socket (Java Developers Almanac Example)
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<h1>The Java Developers Almanac 1.4</h1>
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<B><A HREF="../java.nio/pkg.html#Sockets">Sockets</A></B><font color="#666666" class="xsmall-font">
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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"><b>e176</b> Using a Selector to Manage Non-Blocking Sockets</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) {
}
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<b>Related Examples</b></font></td>
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e174. <a class="eglink" href="ReadSocket.html?l=rel">
Reading from a SocketChannel
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e175. <a class="eglink" href="WriteSocket.html?l=rel">
Writing to a SocketChannel
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e176. <a class="eglink" href="NbClient.html?l=rel">
Using a Selector to Manage Non-Blocking Sockets
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e177. <a class="eglink" href="NbServerSocket.html?l=rel">
Creating a Non-Blocking Server Socket
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e178. <a class="eglink" href="AcceptSocket.html?l=rel">
Accepting a Connection on a ServerSocketChannel
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e179. <a class="eglink" href="NbServer.html?l=rel">
Using a Selector to Manage Non-Blocking Server Sockets
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e180. <a class="eglink" href="DetectClosed.html?l=rel">
Detecting When a Non-Blocking Socket Is Closed by the Remote Host
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See also:
<a class="eglink" href="/egs/java.nio/pkg.html?l=rel#Byte%20Buffers">
Byte Buffers
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<a class="eglink" href="/egs/java.nio/pkg.html?l=rel#File%20Locking">
File Locking
</a>
<a class="eglink" href="/egs/java.nio/pkg.html?l=rel#Files">
Files
</a>
<a class="eglink" href="/egs/java.nio/pkg.html?l=rel#Streams">
Streams
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