private ArrayList<InetAddress> getServerIP() {
		ArrayList<InetAddress> serverIPs = new ArrayList<InetAddress>();
		Properties prop = new Properties();
		InputStream input = null;
		try {
			input = new FileInputStream("serverIP.properties");
			// load a properties file
			prop.load(input);
			// get the property value and print it out
			Enumeration<?> e = prop.elements();
			while (e.hasMoreElements()) {
				InetAddress serverIP = InetAddress.getByName((String) e.nextElement());
				serverIPs.add(serverIP);
			}
		} catch (IOException ex) {
			ex.printStackTrace();
		} finally {
			if (input != null) {
				try {
					input.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return serverIPs;
	}