GuiInterface

gui.setSlot(4, new GuiButton(Material.DIRT));
 
gui.setSlot(5, new ItemStack(Material.DIRT, 64));
 
gui.setSlot(6, new GuiButton(Material.DIRT).setName("&bDirt"));
 
gui.setSlot(7, new GuiButton(new ItemStack(Material.DIRT)).setName("&bDirt").setLore("", "&fIm dirt"));

gui.setOnClick((event) -> {
    event.getWhoClicked().sendMessage("You clicked slot " + event.getSlot());
});
 
gui.setOnOpen((event) -> {
    event.getPlayer().sendMessage("You opened the menu!");
});
 
gui.setOnClose((event) -> {
    event.getPlayer().sendMessage("You closed the menu!");
});
 
gui.setOnPageSwitch((event) -> {
    event.getPlayer().sendMessage("Switched page: " + (event.getOldPage()) + " -> " + event.getPage());
});

gui.fillBorder();
 
gui.addCloseButton();
 
// First page, close button is now redstone torch
gui.addCloseButton(0, new ItemStack(Material.REDSTONE_TORCH));
 
// Gui Button that will open us another GUI
// But replace the ExamplePages::createGui with your own method
gui.setSlot(13, new GuiButton(Material.CHEST).setName("&9Open").setLore("", "&eClick to open another GUI").withRedirect(ExamplePages::createGui));
 
// This will allow player to access his inventory
gui.setSelfInventoryAccess(true);
 
// Allow only left click
gui.allowClickTypes(ClickType.LEFT);
 
// Blacklist right click, any other type of click is allowed
gui.blacklistClickTypes(ClickType.RIGHT);
 
gui.open(player);
 
gui.close(player);
 
gui.switchPage(1, player);
 
// Fill those slots with the default item which is GRAY_STAINED_GLASS_PANE
gui.fillSlots(new HashSet<>(Arrays.asList(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 17, 18, 26, 27, 35, 36, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53));
 
// This slot will be locked displayed on all pages
gui.stickSlot(0);
 
// This slot will be unlocked and players can take items from it
gui.unlockButton(0);