Merge pull request #614 from nextcloud/arrayListInsteadOfList

import java.net.Inet4Address;

import java.net.InetAddress;

import java.net.UnknownHostException;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.HashMap;

import java.util.List;

import java.util.Locale;

import java.util.Map;

import okhttp3.Dns;

/**

 */

public class IPV6PreferringDNS implements Dns {

        private Map<String, List<InetAddress>> cache = new HashMap<>();

    private Map<String, ArrayList<InetAddress>> cache = new HashMap<>();

        @Override

        public List<InetAddress> lookup(String hostname) throws UnknownHostException {

            List<InetAddress> addresses = cache.get(hostname.toLowerCase(Locale.ROOT));

            ArrayList<InetAddress> addresses = cache.get(hostname.toLowerCase(Locale.ROOT));

            if (addresses != null) {

                return addresses;

            }

            addresses = Dns.SYSTEM.lookup(hostname);

            addresses = new ArrayList<>(Dns.SYSTEM.lookup(hostname));

            Collections.sort(addresses, (address1, address2) -> {

                if (address1 instanceof Inet4Address) {

                    return 1;