A.java

gistfile1.txt

import java.net.InetSocketAddress;
import java.nio.channels.DatagramChannel;

public class A {
  public static void main(String[] args) {
    try {
      InetSocketAddress addr = new InetSocketAddress(4321);
      DatagramChannel channel = DatagramChannel.open();
      System.out.println("Connected: " + channel.isConnected());
      System.out.println("Bound: " + channel.socket().isBound());
      System.out.println("Connected: " + channel.socket().isConnected());
      System.out.println("Closed: " + channel.socket().isClosed());
      System.out.println("Localport: " + channel.socket().getLocalPort());
      System.out.println("Connected: " + channel.isConnected());
      channel.socket().bind(addr);
    } catch (Exception e) {
      System.out.println("E: " + e);
    }
  }
}