JAVA

hello world in bukkit

package me.HelloWorld;
 
import java.util.logging.Logger;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.plugin.java.JavaPlugin;
 
public class HelloWorld extends JavaPlugin
{
    Logger log = Logger.getLogger("Minecraft");
 
    public void onEnable()
    {
        log.info("Your plugin has been enabled!");
    }
 
    public void onDisable()
    {
        log.info("Your plugin has been disabled.");
    }
 
    public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args)
    {
        if (cmd.getName().equalsIgnoreCase("hello"))
        {
            sender.sendMessage("Hello World!");
            return true;
        }
        return false;
    }
}