Custom block drop from only given locations.

Hello people.
What i want to accomplish:
A block(this case a spruce leaf block) will drop Grapes(renamed nether stalk).
but i only want it to drop at locations i specify earlier. That way not all spruce leaf blocks drop this, but only the ones at the given locations. this is what i got so far, this is in a block break event:

Code:java

if(blocklocs.contains(event.getBlock().getLocation())){
                System.out.print("1");
                event.setCancelled(true);
                event.getBlock().setType(Material.AIR);
                event.getBlock().getWorld().dropItemNaturally(event.getBlock().getLocation(), wineseed);
                event.getBlock().getWorld().dropItemNaturally(event.getBlock().getLocation(), grapes);
                blocklocs.remove(event.getBlock().getLocation());
                System.out.print(blocklocs);
            }

blocklocs is an arraylist with locations.
my problem is that only the first block i break drops what it should. the other blocks dont drop anything, and the arraylist isnt updated after the first block break.

this is the block creation part:

Code:java

final Block block = event.getClickedBlock().getRelative(BlockFace.UP);
                        block.setTypeId(18);
                        block.setData((byte)2);
 
                        plugin.getServer().getScheduler().scheduleSyncDelayedTask(plugin, new Runnable() {
                                  public void run(){
                                      block.setData((byte)1);
                                blocklocs.add(block.getLocation());
                                System.out.print(blocklocs);
                              }
                        }, 20 * 60 * plugin.getConfig().getInt("Minutes"));

Anyone got any ideas? Or how i could solve this another way?

Hmm. The delayed task cant use a non-final block.

well this is new stuff to me. Could you explain it some more? I dont quite get it.

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

 

anyone got any pointers for me? im stuck at this part

 

Maybe this will come in handy.

InArea Java method (open) InArea Java method (close)

Code:Java

 
public boolean inArea(Location targetLocation, Location inAreaLocation1, Location inAreaLocation2, boolean checkY){
    if(inAreaLocation1.getWorld().getName() == inAreaLocation2.getWorld().getName()){ // Check for worldName location1, location2
        if(targetLocation.getWorld().getName() == inAreaLocation1.getWorld().getName()){ // Check for worldName targetLocation, location1
            if((targetLocation.getBlockX() >= inAreaLocation1.getBlockX() && targetLocation.getBlockX() <= inAreaLocation2.getBlockX()) || (targetLocation.getBlockX() <= inAreaLocation1.getBlockX() && targetLocation.getBlockX() >= inAreaLocation2.getBlockX())){ // Check X value
                if((targetLocation.getBlockZ() >= inAreaLocation1.getBlockZ() && targetLocation.getBlockZ() <= inAreaLocation2.getBlockZ()) || (targetLocation.getBlockZ() <= inAreaLocation1.getBlockZ() && targetLocation.getBlockZ() >= inAreaLocation2.getBlockZ())){ // Check Z value
                    if(checkY == true){ // If should check for Y value
                        if((targetLocation.getBlockY() >= inAreaLocation1.getBlockY() && targetLocation.getBlockY() <= inAreaLocation2.getBlockY()) || (targetLocation.getBlockY() <= inAreaLocation1.getBlockY() && targetLocation.getBlockY() >= inAreaLocation2.getBlockY())){ // Check Y value
                            return true;
                        }
                    }else{
                        return true;
                    }
                }
            }
        }
    }
    return false;
}
 

You can use it like so:

Show Spoiler Hide Spoiler

Code:Java

 
Location blockLocation = event.getBlock().getLocation(); // From the BlockBreakEvent
    World world = plugin.getServer().getWorld("world");
    Location inAreaLocation1 = new Location(world, 200, 64, 200);
    Location inAreaLocation2 = new Location(world, 205, 65, 195);
    if(inArea(blockLocation, inAreaLocation1, inAreaLocation2, false)){ // False, because we don't want it to check for the Y coordinates. 
        // Check if the block is of the correct type/material, and if it is, do the other stuff and give the player the special item. 
    }
 

(Not writen in an IDE, so there could be some errors in it. You'll get the point of what I am trying to do I guess).