abc.java

private static List<ServerAddress> parseServerAddresses(final String serverAddressesString) {

        final String[] serversSplitOnComma = serverAddressesString.split(",");

        final List<ServerAddress> serverAddresses = new ArrayList<>(3);

        for (final String serverAndPort : serversSplitOnComma) {

            final String[] splitOnColon = serverAndPort.split(":");

            final String host = splitOnColon[0];
            final String portAsStr = splitOnColon[1];
            final int port = Integer.parseInt(portAsStr);
            final ServerAddress aServerAddress = new ServerAddress(host, port);
            serverAddresses.add(aServerAddress);
        }
        return serverAddresses;
    }