Right click for command

Code:

public class ItemsAlEntrar implements Listener {
    private BasicPlugin plugin;
  
    public ItemsAlEntrar(BasicPlugin plugin){
        this.plugin = plugin;
    }

@EventHandler
public void onJoin(PlayerJoinEvent event) {
    FileConfiguration config = plugin.getConfig();
    String slot = "Items-Al-Entrar.slot";
    String material = plugin.getConfig().getString("Items-Al-Entrar.material");
    String nombre = "Items-Al-Entrar.nombre";
    Player player = event.getPlayer();

ItemStack item = new ItemStack(Material.getMaterial(material), 1);
ItemMeta meta = item.getItemMeta();

meta.setDisplayName(ChatColor.translateAlternateColorCodes('&', config.getString(nombre)));
ArrayList<String> lore = new ArrayList<String>();
List<String> desc = config.getStringList("Items-Al-Entrar.lore");
for(int i=0;i<desc.size();i++){
String desc1 = desc.get(i);
lore.add(ChatColor.translateAlternateColorCodes('&', desc1));
meta.setLore(lore);
item.setItemMeta(meta);

player.getInventory().setItem(config.getInt(slot), item);
  }
}
}

I have done this code that consists in that when the player enters an item, what I want to do is that when I right click the item, execute a command