Create Inventory Menus with Ease!

EasyGUI

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;
 
public class EasyGUI {

	private Inventory inventory;
	
	private String name;
	
	private int slots;

	private List<ItemStack> items = new ArrayList<ItemStack>(); 
	
	private HashMap<Integer, ItemStack> itemSlot = new HashMap<Integer, ItemStack>();
	
	/** 
	 * @param inventoryName - Name the inventory
	 */
	public EasyGUI(String inventoryName){
		this.name = inventoryName;
	}
	
	/**
	 * 
	 * @param item - Add an item
	 * @return The class
	 */
	public EasyGUI addItem(ItemStack[] item){
		for(ItemStack i : item){
			this.items.add(i);
		}
		return this;
	}
	
	/** 
	 * @return The slots
	 */
	public int getSize(){return this.slots;}
	
	/**
	 * @return The name
	 */
	public String getName(){return this.name;}

	/**
	 * @return a clear inventory
	 */
	public EasyGUI clear(){
		this.items.clear(); this.itemSlot.clear();
		return this;
	}
	
	/**
	 * @param item
	 * @return A boolean
	 */
	public boolean contains(ItemStack item){
		if(this.items.contains(item) || this.itemSlot.values().contains(item))
			return true;
		return false;
	}
	
	/**
	 * @param item
	 * @return A boolean
	 */
	public boolean contains(Material material){
		List<Material> materials = new ArrayList<Material>();
		for(ItemStack item : items){
			materials.add(item.getType());
		}
		for(ItemStack item: itemSlot.values()){
			materials.add(item.getType());
		}
		
		return materials.contains(material);
	}
	
	/**
	 * @param item
	 * @return The class
	 */
	public EasyGUI addItem(ItemStack item){
		items.add(item);
		return this;
	}

	/**
	 * @param slot
	 * @param item
	 * @return The class
	 */
	public EasyGUI setItem(int slot, ItemStack item){
		itemSlot.put(slot, item);
		return this;
	}
	
	/**
	 * @param slots
	 * @return The class
	 */
	public EasyGUI setSlots(int slots){
		this.slots = slots;
		return this;
	}
	
	/**
	 * @param player
	 */
	public void openGUIFor(Player player){
		this.inventory = Bukkit.createInventory(null, slots, name);
		for(Integer slot : this.itemSlot.keySet()){
			inventory.setItem(slot, this.itemSlot.get(slot));
		}
		for(ItemStack i : this.items){
		inventory.addItem(i);
		}
		player.openInventory(this.inventory);
	}
	
	/**
	 * @param ItemStack item
	 */
	public void removeItem(ItemStack item){
		if(!itemSlot.values().contains(item) || items.contains(item)) return;
		
		if(itemSlot.values().contains(item)){
			for(int slot : itemSlot.keySet()){
				if(itemSlot.get(slot).equals(item)){
					itemSlot.remove(slot);
				}
			}
		} else if(items.contains(item)){
			items.remove(item);
		}
	}
	
}