Random array of items

Im working on a plugin where there will be chests spawned in with random loot in them. I have everything working, except for the actually items inside part. So I need to know how I would go about having an array of items that are random every time rather than just being set loot in. How would I go about doing this? Feel free to ask questions about what I mean, I can see that this might come across as a confusion question.

 

chrisman0091 Create an inventory of items, and use the Random to pick the ammount of items you want in a chest. Then, take the random ammount of items from the inventory randomly

 

I do what you're looking to do here (but probably in a much more complex way than needed).

Besides that, the ways xTigerRebornx suggested would work but I would use an array of ItemStacks to pick from instead of a chest.

 

Jogy34 Array would work to, I just suggested the first thing that came to find