Bukkit - PlayerJoinEvent, giving items

package me.mrtang;

import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.plugin.java.JavaPlugin;

public class JoinEvent extends JavaPlugin implements Listener {

    public void onEnable() { //Registers the event.
        System.out.println("Swage test");
        Bukkit.getServer().getPluginManager().registerEvents(this, this);
    }

    @EventHandler
    public void onPlayerJoin(PlayerJoinEvent evt) {
        Player p = (Player) evt.getPlayer(); //Declares the player
        if (p.getInventory().contains(Material.NETHER_STAR)) { //Checks for item
            return; //Returns if player has item
        } else {
        p.setItemInHand(new ItemStack(Material.NETHER_STAR)); //Gives item in his hand
        }
    }
}

/* PLUGIN.YML
main: me.mrtang.JoinEvent
name: JoinEventTest
version: 1.0
*/