Detecting if a chest has X amount of Y item

I'm currently developing something that uses BattleArena's API, that makes it so if I have 64 diamonds in the chest it would end the Battle.

There's 2 chests and each team has their own chest in their own base. If a team has 64 diamonds in their chest, it ends the game.

Is there a listener to check if there's 64 items in a unique chest?

 

EggRoll

Code:java

private int getXItemsOfY(ItemStack Y){
Inventory inv = yourInventory();
int x = 0;
if(inv.contains(y)){
for(ItemStack item : inv.getContents()){
if(y.equals(item)){
x++;
}
}
}
 
return x;
}
 
 

something like this?

 

There is a double chest inventory event. I've never used it, but it could be of some use to you.
http://jd.bukkit.org/rb/apidocs/org/bukkit/inventory/DoubleChestInventory.html
You can check the contents of the chest and see if it equals what you need

 

What I'm confused about is how to tell which chest is which since there are 2.

Thanks for the help so far though I looked at the docs and just realized that it inherits the methods from Inventory.