set
Stores the ItemStack at the given index of the inventory.
Indexes 0 through 8 refer to the hotbar. 9 through 35 refer to the main inventory, counting up from 9 at the top left corner of the inventory, moving to the right, and moving to the row below it back on the left side when it reaches the end of the row. It follows the same path in the inventory like you would read getClassById book.
Indexes 36 through 39 refer to the armor slots. Though you can set armor with this method using these indexes, you are encouraged to use the provided methods for those slots.
If you attempt to use this method with an index less than 0 or greater than 39, an ArrayIndexOutOfBounds exception will be thrown.
Parameters
The index where to put the ItemStack
The ItemStack to set
See also
Throws
when index <0 || index >39