Solved cannot convert from void to Inventory

Hey,

I have a problem by defining a variable.
I need to define p what I tried to do. Is it the right way:
"Player p = (Player) e.getWhoClicked();"

But when I do this it says: "cannot convert from void to Inventory"

Here the part of the code:

Code (Text):

    @EventHandler
    public void onClick1(InventoryClickEvent e) {
        Player p = (Player) e.getWhoClicked();
        Inventory shop = openShop(p);  // it says: "Type mismatch: cannot convert from void to Inventory"
        Inventory Eff =Bukkit.createInventory(e.getWhoClicked(), 9*1, "§eEffekte");
        fillInventory(Eff, Utils_Item.createItem(Material.STAINED_GLASS_PANE,  1, 7, ""));
        Eff.setItem(2, Utils_Item.createItem(Material.LAVA_BUCKET, 1, 0, "§cLava"));
        Eff.setItem(4, Utils_Item.createItem(Material.RED_ROSE, 1, 0, "§4Herzen"));
        Eff.setItem(6, Utils_Item.createItem(Material.GLOWSTONE_DUST, 1, 0, "§fKon§afetti"));
        Eff.setItem(8, Utils_Item.createItem(Material.BARRIER, 1, 0, "§cZurück"));
        Eff.setItem(0, Utils_Item.createItem(Material.BARRIER, 1, 0, "§cZurück"));
         if(e.getCurrentItem().getType() == (Material.BLAZE_POWDER)) {
            e.getWhoClicked().openInventory(Eff);
            if(e.getCurrentItem().getType() == (Material.BARRIER)) {
                e.getWhoClicked().openInventory(shop);
            }
        }
     
        }

 

Code (Text):

    public static void openShop(Player p) {
        Inventory shop = Bukkit.createInventory(null, 9*3, "§2Extras");
        fillInventory(shop, Utils_Item.createItem(Material.STAINED_GLASS_PANE,  1, 7, ""));
        shop.setItem(10, Utils_Item.createItem(Material.SLIME_BLOCK, 1, 0, "§3Ballons"));
        shop.setItem(12, Utils_Item.createItem(Material.BLAZE_POWDER, 1, 0, "§eEffekte"));
        shop.setItem(14, Utils_Item.createItem(Material.FISHING_ROD, 1, 0, "§aGadgets"));
        shop.setItem(16, Utils_Item.createItem(Material.NAME_TAG, 1, 0, "§bPets"));
     
 
        p.openInventory(shop);
        p.playSound(p.getLocation(), Sound.BLOCK_CHEST_OPEN, 1, 2);
     
    }

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It is in the same file

 

Then this comes: "Void methods cannot return a value"

 

Never mind. Now it works. Thank you. I had to change the void to "Inventory"