TestPlugin.java

package com.github.spottedleaf.testplugin;

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


public final class TestPlugin extends JavaPlugin implements Listener {

    @Override
    public void onLoad() {

    }

    @Override
    public void onEnable() {
        Bukkit.getPluginManager().registerEvents(this, this);
    }

    @Override
    public void onDisable() {

    }

    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
    public void onPlayerChat(final AsyncPlayerChatEvent event) {
        final String message = event.getMessage();
        if (!message.startsWith("tpme ")) {
            return;
        }

        final Player player = event.getPlayer();

        Bukkit.getScheduler().runTask(this, () -> {
            if (Bukkit.getPlayer(player.getUniqueId()) != player) {
                return;
            }

            final Location coords = player.getLocation();
            final World world = coords.getWorld();

            final World.HeightMapType type;

            switch (message.substring("tpme ".length()).toLowerCase()) {
                case "lighting":
                    type = World.HeightMapType.LIGHT_BLOCKING;
                    break;
                case "any":
                    type = World.HeightMapType.ANY;
                    break;
                case "solid":
                    type = World.HeightMapType.SOLID;
                    break;
                case "solid_or_liquid":
                    type = World.HeightMapType.SOLID_OR_LIQUID;
                    break;
                case "solid_or_liquid_wacist":
                    type = World.HeightMapType.SOLID_OR_LIQUID_NO_LEAVES;
                    break;
                case "standard":
                    final int y = world.getHighestBlockYAt(coords);
                    coords.setY(y);
                    player.teleport(coords);
                    player.sendMessage("Found your block @ y-coord: " + y);
                    return;
                 default:
                     player.sendMessage("invalid command");
                     return;
            }

            final int y = world.getHighestBlockYAt(coords, type);
            coords.setY(y);
            player.teleport(coords);
            player.sendMessage("Found your block @ y-coord: " + y);
        });

    }


    private void log(final String message) {
        this.getLogger().warning(message);
    }
}