public class ExampleGui {
 
    public static void open(Player p) {
        createGui().open(p);
    }
 
    private static GuiMenu createGui() {
 
        GuiMenu gui = Seasons.xagui.createMenu("&bExample", 6);
 
        // Fill border with GRAY_STAINED_GLASS_PANE by default
        gui.fillBorder();
 
        // Or you can fill border with specified Material or ItemStack:
        // gui.fillBorder(Material.DIRT);
 
        // Creating our fist GUI Button:
        // You can neither use Material or ItemStack
        GuiButton button1 = new GuiButton(Material.DIAMOND);
 
        // And if you are using XaGUI version pre-v0.4 or lower, you can only use ItemStack
        //GuiButton button1 = new GuiButton(new ItemStack(Material.DIAMOND));
 
 
        // Now we can set slot 4 to our created button above, rename it and set its amount to 64
        gui.setSlot(4, button1.setName("&b&lDiamond").setAmount(64));
 
        // And add an automatically generated close button (barrier)
        gui.addCloseButton();
 
        // Or you can add a custom close button:
        // gui.addCloseButton(new ItemStack(Material.REDSTONE_TORCH));
 
        // Now we are going to create a button in slot 22 that will give us 1x EMERALD after clicking on it
 
        GuiButton emeraldButton = new GuiButton(Material.EMERALD).setName("&a&lEmerald").withListener((event) -> {
            Player player = (Player) event.getWhoClicked();
            player.getInventory().addItem(new ItemStack(Material.EMERALD));
        });
        gui.setSlot(22, emeraldButton);
 
        // Let's modify allowed click types, so only left click will be allowed nothing else
        // Whitelist has higher priority than Blacklist
        // gui.allowClickTypes(ClickType.LEFT);
 
        // Or you can blacklist some click types, so everything is allowed except the ones you specify
        // gui.blacklistClickTypes(ClickType.RIGHT, ClickType.SHIFT_LEFT, ClickType.SHIFT_RIGHT);
 
 
        // You can also create click listener for the whole menu
        // If you click a button with listener it will be called after this global one
        gui.setOnClick((event) -> {
            event.getWhoClicked().sendMessage("You clicked slot " + event.getSlot());
        });
 
        // Or create onOpen or onClose listeners
        gui.setOnOpen((event) -> {
            event.getPlayer().sendMessage("You opened the menu!");
        });
 
        gui.setOnClose((event) -> {
            event.getPlayer().sendMessage("You closed the menu!");
        });
 
        // We can also unlock slot, so players can take items from it
        // To lock it again use .lockButton(slot)
        gui.setSlot(23, Material.GRASS_BLOCK);
        try {
            gui.unlockButton(23);
            /*
                The item can be only taken by shift left click
                 It is because XaGUI is automatically blocking click action on AdjacentSlots (player's inventory)
                 So solution would be .setSelfInventoryAccess(true) to allow player click on his inventory
                 But be careful, because player can shift click any item from his inventory to the menu
             */
            //gui.setSelfInventoryAccess(true);
        } catch (SlotOutOfBoundException e) {
            // IGNORE
        }
 
        // Now we will create a button that will change its icon from book to bookshelf after clicking on it, and keep the listener
        GuiButton changingButton = new GuiButton(new ItemStack(Material.BOOK)).setName("&a&lClick me!").withListener((event) -> {
            gui.updateSlot(event.getSlot(), Material.BOOKSHELF);
 
            // If you want to drop the listener, use .setSlot() instead of .updateSlot()
            //gui.setSlot(event.getSlot(), Material.BOOKSHELF);
        });
 
        gui.setSlot(24, changingButton);
 
        gui.setSlot(13, new GuiButton(new ItemStack(Material.CHEST)).setName("&9Multi page GUI").setLore("", "&eClick to open multi page GUI").withRedirect(ExamplePages::createGui));
 
        return gui;
    }
}

ExampleGui.open(player);