Java NIO client

Question

import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.nio.By         


        

Answer 1

You need to check for a connectable key, e.g.

if (key.isConnectable()) {
  this.doConnect(key);
}
...
private void doConnect(SelectionKey key) {
  SocketChannel channel = (SocketChannel) key.channel();
  if (channel.finishConnect()) {
    /* success */
  } else {
    /* failure */
  }
}

Use SocketChannel.finishConnect to determine whether the connection was established successfully.