不定长参数

/**
 * Requests a list of itemstacks.
 *
 * @param stacks the stacks.
 * @return true if they're in the inventory.
 */
public boolean checkIfRequestForItemExistOrCreate(@NotNull final ItemStack... stacks)
{
    return checkIfRequestForItemExistOrCreate(Lists.newArrayList(stacks));
}

/**
 * Check if any of the stacks is in the inventory.
 *
 * @param stacks the list of stacks.
 * @return true if so.
 */
public boolean checkIfRequestForItemExistOrCreate(@NotNull final Collection<ItemStack> stacks)
{
    return stacks.stream().allMatch(this::checkIfRequestForItemExistOrCreate);
}