Item Utils - By zViitoor

    public int getItemsInPlayerInventorySize(Player p) {
        int i = 0;
        for (ItemStack is : p.getInventory().getContents()) {
            if (is != null && is.getType() != Material.AIR) {
                i = i + 1;
            }
        }
        for (ItemStack is : p.getInventory().getArmorContents()) {
            if (is != null && is.getType() != Material.AIR) {
                i = i + 1;
            }
        }
        return i;
    }

    public int getItemsSizeInPlayerInventory(Player p){
        int i = 0;
        for (ItemStack is : p.getInventory().getContents()) {
            if (is != null && is.getType() != Material.AIR) {
                i = i + is.getAmount();
            }
        }
        for (ItemStack is : p.getInventory().getArmorContents()) {
            if (is != null && is.getType() != Material.AIR) {
                i = i + is.getAmount();
            }
        }
        return i;
    }