DatagramSocket theServer;
for (int i = 1024; i <= 65535; i++) {
try {
// the next line will fail and drop into the catch block if
// there is already a server running on port i
theServer = new DatagramSocket(i);
theServer.close();
}
catch (SocketException e) {
System.out.println("There is a server on port " + i + ".");
} // end try
} // end for
