Player Fly

Hello !
I want to make a plugin but i don't know why isn't working.
I don't have any error but on server aren't showing something.
If a player flies to more than 20 blocks above the ground, display that messages and make an explosion at his location.

Code:

Code:

package com.encodare.main;

import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.Location;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.player.PlayerMoveEvent;

public class main extends JavaPlugin {
 
    @Override
    public void onEnable() { 
        getLogger().info("Encodare has been loaded.");
    }
 
    @Override
    public void onDisable() {
        getLogger().info("Encodare has been unloaded.");
    }
 
    // Fly > 20 blocks
    @EventHandler
    public void onFly(PlayerMoveEvent e)
    {
        Player player = e.getPlayer();
     
        if(player.isFlying()  &&  e.getTo().getY() >= 20)
       {
                player.sendMessage("So.. You think it's funny to fly around this lands ?");
                player.sendMessage("Guess what: Roberto, from Romania, wasn't happy after flying.");
                player.setFlying(false);
                Location loc = player.getLocation();
                loc.getWorld().createExplosion (loc, 4.0F);
        }
    }
}

 

How can i do that ?
I'm beginner in java plugins.
@timtower

 

@timtower

I added it, but still not working..

Code:

package com.encodare.main;

import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerMoveEvent;

public class main extends JavaPlugin implements Listener {
   
    @Override
    public void onEnable() {   
        getLogger().info("Encodare has been loaded.");
        Bukkit.getServer().getPluginManager().registerEvents(this, this);
    }
   
    @Override
    public void onDisable() {
        getLogger().info("Encodare has been unloaded.");
    }
   
    // Fly > 20 blocks
    @EventHandler
    public void onFly(PlayerMoveEvent e)
    {
        Player player = e.getPlayer();
       
        if(player.isFlying())
            player.sendMessage("It work.");
       
        if(player.isFlying() && e.getTo().getY() >= 20)
        {
                player.sendMessage("So.. You think it's funny to fly around this lands ?");
                player.sendMessage("Guess what: Roberto, from Romania, wasn't happy after flying.");
                player.setFlying(false);
                Location loc = player.getLocation();
                loc.getWorld().createExplosion (loc, 4.0F);
        }
    }
}

 

@timtower

I added this code:

Code:

public void function(PlayerMoveEvent e)
    {
        Player player = e.getPlayer();
       
        player.sendMessage("Work.");
    }

It don't send the message.

 

How can i do that ?

Problem solved.
Thanks for help !

EDIT by Moderator: merged posts, please use the edit button instead of double posting.