A method to determine the ping of a server in milliseconds in Java

ServerPinger.java

/**
* A method to determine the ping of a server in milliseconds
* @param ip The ip address of the server you want to ping
* @param timeout The time window in which the destination has time to respond
* @return If the server is reachable within the timout it returns the ping time in ms, otherwise -1
* @throws IOException
*/
public static long pingServer(String ip, int timeout) throws IOException {
	InetAddress address = InetAddress.getByName(ip);
	long currentTime = System.currentTimeMillis();
	boolean reachable = address.isReachable(timeout);
	long endTime = System.currentTimeMillis() - currentTime;

	return (reachable ? endTime : -1);
}