Playerlist implementation

    public void sendList(Player p) {
        //Create a new ArrayList for all the entries
        ArrayList<ListEntry> entries = new ArrayList<>();

        for (Player player : Bukkit.getOnlinePlayers()) { //Loop thru players
            if (player.isOp()) continue; //Nowhere in your code you deal with players who are OP? so just skip them?

            //Deal with ranks
            if (tryToAdd(entries, 1, player, ChatColor.DARK_RED,    "owner"))       continue; //Try to add, if it added, continue to next player
            if (tryToAdd(entries, 2, player, ChatColor.RED,         "admin"))       continue; //If it didn't, move on to the next rank
            if (tryToAdd(entries, 3, player, ChatColor.DARK_PURPLE, "moderator"))   continue;
            if (tryToAdd(entries, 4, player, ChatColor.GOLD,        "pro"))         continue;
            if (tryToAdd(entries, 5, player, ChatColor.BLUE,        "mvp"))         continue;
            if (tryToAdd(entries, 6, player, ChatColor.GREEN,       "vip"))         continue;
            if (tryToAdd(entries, 7, player, ChatColor.YELLOW,      "default"))     continue;
        }

        //Now you should have a list full with entires, since it implements Comparable you can sort it.
        Collections.sort(entries);

        //Build the message
        String msg = "Players: ";

        boolean first = true;
        for (ListEntry entry : entries) { //Loop thru entries
            if (!first) { //Check if not first player added
                msg += ChatColor.WHITE + ", "; //Add the ,
            }

            first = false;
            msg += entry.color + entry.name; //Add the color + name to the message
        }

        //Message is complete
        p.sendMessage(msg);

    }

    private boolean tryToAdd(ArrayList<ListEntry> entries, int rank, Player player, ChatColor color, String permission) {
        if (player.hasPermission("dkhc." + permission)) {
            entries.add(new ListEntry(rank, player.getName(), color));
            return true;
        }
        return false;
    }


    private class ListEntry implements Comparable<ListEntry> {

        int rank;
        String name;
        ChatColor color;

        public ListEntry(int rank, String name, ChatColor color) {
            this.rank = rank;
            this.name = name;
            this.color = color;
        }

        @Override
        public int compareTo(ListEntry o) { //First sort on rank -> After that sort on name
            //First check on rank
            int comparison = Integer.valueOf(rank).compareTo(Integer.valueOf(o.rank)); //Compare the rank of this entry to the otherone

            //If you want to sort on names, use this: | Otherwise just return the comparison
            if (comparison != 0) return comparison; //Ranks aren't equal, return the difference
            //return comparison;

            //Optional: Sort on name
            return name.toLowerCase().compareTo(o.name.toLowerCase()); //Compare names
        }
    }