Listener

package me.jkjames7.firework;


import org.bukkit.ChatColor;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerChatEvent;

@SuppressWarnings("deprecation")
public class MyPlayerListener implements Listener {

	public void onPlayerChat(PlayerChatEvent event) {
		Player player = event.getPlayer();


		if (event.getMessage().toLowerCase().contains("!welcome")){
		 if(player.isOp()){
			   player.setHealth(20);
			   player.setFoodLevel(20);
			   player.sendMessage(ChatColor.GREEN + "Healed!");
		 }if (event.getMessage().toLowerCase().contains("kill")) {
				if(player.isOp()){
				   player.sendMessage(ChatColor.GREEN + "You died!");
				   player.setHealth(0);
		 } if (event.getMessage().toLowerCase().contains("sendme")) {
					if(player.isOp()){
					   player.sendMessage("Send You!");
					}
				}

			}
		}
	}
}