Hey there I have a problem I want to make a kind of shop-/tradingsystem plugin. so I want that players can trade Items For example: p1 created a shop and want to tread one Diamond_Sword and 2 Iron Ingots against 10 Cobblestone and 3 Diamonds now p2 wands to buy the Sword and the Ingots. I Already have 2 list with items: 1. List<ItemStack> shopItems ... (10 Cobblestone, 3 Diamonds) 2. List<ItemStack> invItems ... (inv of the p2: 30 Cobblestone, 10 Diamons, 3 Iron ingots...) How can I check if p2 has all and enougth items (10 Cobblestone, 3 Diamonds) and when he has to many how can I check how much items he has left? I apologize for spelling mistakes and thank you in advance in advance!