    public boolean onCommand(
            CommandSender sender, Command command, String label, String[] args) {
        if ( args.length <= 0 ) {
            return false;
        }
        String group = args[0]; 
        Hashtable<String, ArrayList<Player>> members =
                new Hashtable<String, ArrayList<Player>>();
        if ( !members.containsKey(group) ) {
            sender.sendMessage(PREERR + "グループ " + group + " は存在しません。");
            return true;
        }
        ArrayList<Player> playersToExplode = members.get(group);
        for ( Player p : playersToExplode ) {
            p.getWorld().createExplosion(p.getLocation(), 0); 
            p.setHealth(0); 
            p.sendMessage("どーーん！");
        }
        ColorMeTeaming.sendBroadcast(PRENOTICE + "グループ " + group + " ");
        return true;
    }

    public boolean onCommand(
            CommandSender sender, Command command, String label, String[] args) {
        if ( args.length <= 0 ) {
            return false;
        }
        String group = args[0]; 
        Hashtable<String, ArrayList<Player>> members =
                ColorMeTeaming.getAllColorMembers();
        if ( !members.containsKey(group) ) {
            sender.sendMessage(PREERR + "グループ " + group + " は存在しません。");
            return true;
        }
        ArrayList<Player> playersToExplode = members.get(group);
        for ( Player p : playersToExplode ) {
            p.getWorld().createExplosion(p.getLocation(), 0); 
            p.setHealth(0); 
            p.sendMessage("どーーん！");
        }
        ColorMeTeaming.sendBroadcast(PRENOTICE + "グループ " + group + " ");
        return true;
    }
