public class PlayerJoin implements Listener {


	@SuppressWarnings("deprecation")
	@EventHandler
	public void onPlayerJoin(PlayerJoinEvent e) {
		Player p = e.getPlayer();

		if(EssentialsCommand.flyPlayer.contains(p)) {
			p.setAllowFlight(true);
			p.sendMessage("fly");

		}else {
			p.sendMessage(EssentialsCommand.flyPlayer.toString());
		}
}
}


public class EssentialsCommand implements CommandExecutor {

	public static List<Player> flyPlayer = new ArrayList<>();
	public static List<Player> vanishPlayer = new ArrayList<>();

	public EssentialsCommand(Main plugin) {
		this.plugin = plugin;
	}

	@SuppressWarnings("deprecation")
		@Override
		public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
				Player p = (Player) sender;
				if(cmd.getName().equalsIgnoreCase("fly")) {
					if(args.length == 0) {
						if(p.hasPermission("essentials.fly")) {
							if(flyPlayer.contains(p)) {
								p.setAllowFlight(false);
								flyPlayer.remove(p);
								p.sendMessage(plugin.prefix + "§dDu kannst nicht mehr fliegen!");
							}else {
								p.setAllowFlight(true);
								flyPlayer.add(p);
								p.sendMessage(plugin.prefix + "§dDu kannst fliegen!");

							}
						}else {
							noPermssion(p);
						}
		}
}