<repository>
  <id>greatman-repo</id>
  <url>http://repo.greatmancode.com/content/groups/public/</url>
</repository>

<dependency>
  <groupId>ninja.amp</groupId>
  <artifactId>ampmenus</artifactId>
  <version>1.4-SNAPSHOT</version>
  <scope>compile</scope>
</dependency>

// Important - Register the MenuListener on enable or before players are able to open them
MenuListener.getInstance().register(plugin);

// Create an ItemMenu instance - you only need one of these. Don't create one every time you need it...
ItemMenu menu = new ItemMenu("Shop", Size.TWO_LINE, plugin);

// Adding items to your ItemMenu
menu.setItem(17, new CloseItem());

// Opening the menu for a Player
menu.open(player);

public class ShopMenu extends ItemMenu {
    public ShopMenu(JavaPlugin plugin) {
        super("Shop", Size.TWO_LINE, plugin);

        // Adding items to your ItemMenu
        setItem(17, new CloseItem());
    }

    // Useful in case you only want the back item to appear if the menu has a parent
    @Override
    public void setParent(ItemMenu parent) {
        super.setParent(parent);
        if (parent != null) {
            setItem(16, new BackItem());
        }
    }
}

// Setting parent menus so that the BackItem knows where to go
ItemMenu subMenu = new ItemMenu("Vote Perks", Size.FIVE_LINE, plugin);
subMenu.setParent(mainMenu);
OR
ItemMenu subMenu = new ItemMenu("Vote Perks", Size.FIVE_LINE, plugin, mainMenu);

/**
* A MenuItem that makes the player perform the "kill" command
*/
public class SuicideItem extends MenuItem {
    private static final String DISPLAY_NAME = ChatColor.BLUE + "Click for OP!";
    private static final ItemStack ICON = new ItemStack(Material.DIAMOND);

    public SuicideItem() {
        super(DISPLAY_NAME, ICON);
    }

    // This method controls what happens when the MenuItem is clicked
    @Override
    public void onItemClick(ItemClickEvent event) {
        event.getPlayer().performCommand("kill");
    }

    // This method lets you modify the ItemStack before it is displayed, based on the player opening the menu
    @Override
    public ItemStack getFinalIcon(Player player) {
        ItemStack finalIcon = super.getFinalIcon(player);
        if (player.hasPermission("you.cant.fool.me")) {
            finalIcon.setType(Material.LEASH);
            ItemMeta meta = finalIcon.getItemMeta();
            meta.setDisplayName(ChatColor.DARK_RED + "Suicide");
            finalIcon.setItemMeta(meta);
        }
        return finalIcon;
    }
}