onPlayerChat "not working?"

I have heard that it is deprecated, and I fail at java(I like C++ more), so can you tell me what is wrong with this?
Lrn2Bukkit.java(main):
package co.cc.namesnipe.Lrn2Bukkit;

import java.util.logging.Logger;

//import org.bukkit.World;
//import org.bukkit.entity.CreatureType;
import org.bukkit.event.player.PlayerChatEvent;
import org.bukkit.plugin.java.JavaPlugin;

public class Lrn2Bukkit extends JavaPlugin {
Logger log = Logger.getLogger("Minecraft");
public void onEnable(){
log.info("Lrn2Bukkit: Enabled.");
}

public void onDisable(){
log.info("Lrn2Bukkit: Disabled.");
}

public void onPlayerChat(PlayerChatEvent ev) {
String message = ev.getMessage().toLowerCase();
if (message.contains("taco")) {
log.info("Detected");
//World w = ev.getPlayer().getWorld();
//w.spawnCreature(ev.getPlayer().getLocation(),CreatureType.SQUID);
}
}
}
plugin.yml:
name: Lrn2Bukkit
main: co.cc.namesnipe.Lrn2Bukkit.Lrn2Bukkit
version: 1.0.0
It does not error, but it does nothing.

 

Start learning: http://wiki.bukkit.org/Introduction_to_the_New_Event_System

 

Thank you, sorry for spamming.