Method getHostAddress

app/src/main/java/javax/mail/URLName.java:496–508

Get the IP address of our host. Look up the name the first time and remember that we've done so, whether the lookup fails or not.

()

     * so, whether the lookup fails or not.
     */
    private synchronized InetAddress getHostAddress() {
	if (hostAddressKnown)
	    return hostAddress;
	if (host == null)
	    return null;
	try {
	    hostAddress = InetAddress.getByName(host);
	} catch (UnknownHostException ex) {
	    hostAddress = null;
	}
	hostAddressKnown = true;
	return hostAddress;
    }

    /**
     * The class contains a utility method for converting a