Main.class - Tutorial 9

package me.inamine.HoloTut;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Location;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.java.JavaPlugin;

import com.gmail.filoghost.holographicdisplays.api.Hologram;
import com.gmail.filoghost.holographicdisplays.api.HologramsAPI;

public class Main extends JavaPlugin
{
    @Override
    public void onEnable(){}
    @Override
    public void onDisable(){}

    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args)
    {
        if (args[0] != null && args[0] != "")
        {
            String message = "";
            for (String arg : args)
            {
                message = message + arg + " ";
            }
            Player player = (Player) sender;
            makeHologram(player, message);
            return true;

        }

        return false;
    }


    public void makeHologram(Player pl, String message)
    {
        try
        {
            Plugin plugin = this;

            Location loca = pl.getLocation();

            loca.setY(pl.getLocation().getY() + 2.3D);
            Hologram holo = HologramsAPI.createHologram(plugin, loca);
            String colorMsg = ChatColor.translateAlternateColorCodes('&', message);

            holo.appendTextLine(colorMsg);


            final int id = Bukkit.getServer().getScheduler().scheduleSyncRepeatingTask(plugin, new Runnable()
                    {

                        @Override
                        public void run()
                        {
                            Location newLoc = pl.getLocation();
                            newLoc.setY(newLoc.getY() + 2.3D);
                            holo.teleport(newLoc);

                        }

                    }, 0, 2L);

            Bukkit.getServer().getScheduler().scheduleSyncDelayedTask(plugin, new Runnable()
                    {

                        @Override
                        public void run()
                        {
                            holo.delete();
                            Bukkit.getScheduler().cancelTask(id);
                        }

                    }, 100L);

        }
        catch (NoClassDefFoundError e)
        {
            e.printStackTrace();
        }
    }

}