演示SocketChannel的异步连接。

import java.net.InetSocketAddress;

import java.nio.channels.SocketChannel;/**来 自 nowjava.com**/


public class Main {

  public static void main(String[] argv) throws Exception {

    String host = "localhost";

    int port = 80;


    InetSocketAddress addr = new InetSocketAddress(host, port);

    SocketChannel sc = SocketChannel.open();

    sc.configureBlocking(false);

    System.out.println("initiating connection");

    sc.connect(addr);/** from 时代Java**/

    while (!sc.finishConnect()) {

      doSomethingUseful();

    }

    System.out.println("connection established");

    // Do something with the connected socket

    // The SocketChannel is still nonblocking

    sc.close();

  }