Testing whether a list of URLs are active or not in java?

I am trying to test a list of ip addresses in a local network. Currently the way I do it is by passing each ip through the following method:

Code Java:

---

public static void testURL(String strUrl) throws Exception {
 
try {
URL url = new URL(strUrl);
HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
urlConn.connect();
 
assertEquals(HttpURLConnection.HTTP_OK, urlConn.getResponseCode());
} catch (IOException e) {
System.err.println("Error creating HTTP connection");
e.printStackTrace();
throw e;
}
}

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since i m going from 0 to 255, the whole process takes like an hour to finish, so I was wondering is there a way to check, which is faster than that?

You could use a Socket with a timeout set.

As explained here - java - can i speed up the scanning port process? - Stack Overflow

Also see - http://www.antionline.com/showthread.php?t=255698