How to respawn items after he disappears?

After drop a item, he disappears after while, how do I check if it is still there, and if not, how do I show it again?

I tried to use item.isDead() but not work.

 

I mean than there is ItemDespwnEvent, or somethnig like this..

 

I Found

http://jd.bukkit.org/doxygen/d6/d78/classorg_1_1bukkit_1_1event_1_1entity_1_1ItemDespawnEvent.html


Thank you

Right, this work very well, but I found a problem.

When this event is canceled, the item still there, but invisible until I reconnect or get a chunk update.

There is same way to this item not get invisible or send to near players to update that chunk to see that item?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

I think you can update a chunk

Maybe with chunk.load();

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

I used this, but not work

Code:

@EventHandler(priority = EventPriority.HIGH)
    public void onItemDespawnEvent(ItemDespawnEvent event)
    {
        Item item = event.getEntity();
             
        if (item.hasMetadata("nodespawn"))
        {
            event.setCancelled(true);
            log.debug("ItemDespawnEvent: Evento Cancelado");
         
            World  w    = item.getWorld();
            int x  = (int)(double)item.getLocation().getX();
            int z  = (int)(double)item.getLocation().getZ();
         
            Chunk c = w.getChunkAt(x, z);
            c.unload();
            c.load();
        }
    }