import net.minecraft.server.Items; //导入依赖的package包/类
public static void handleEditBookEvent(EntityPlayer player, ItemStack newBookItem) {
    int itemInHandIndex = player.inventory.itemInHandIndex;

    PlayerEditBookEvent editBookEvent = new PlayerEditBookEvent(player.getBukkitEntity(), player.inventory.itemInHandIndex, (BookMeta) CraftItemStack.getItemMeta(player.inventory.getItemInHand()), (BookMeta) CraftItemStack.getItemMeta(newBookItem), newBookItem.getItem() == Items.WRITTEN_BOOK);
    player.world.getServer().getPluginManager().callEvent(editBookEvent);
    ItemStack itemInHand = player.inventory.getItem(itemInHandIndex);

    // If they've got the same item in their hand, it'll need to be updated.
    if (itemInHand != null && itemInHand.getItem() == Items.BOOK_AND_QUILL) {
        if (!editBookEvent.isCancelled()) {
            CraftItemStack.setItemMeta(itemInHand, editBookEvent.getNewBookMeta());
            if (editBookEvent.isSigning()) {
                itemInHand.setItem(Items.WRITTEN_BOOK);
            }
        }

        // Client will have updated its idea of the book item; we need to overwrite that
        Slot slot = player.activeContainer.getSlot(player.inventory, itemInHandIndex);
        player.playerConnection.sendPacket(new PacketPlayOutSetSlot(player.activeContainer.windowId, slot.rawSlotIndex, itemInHand));
    }
}
 

import net.minecraft.server.Items; //导入依赖的package包/类
@Override
public CraftMapView createMap(World world) {
    Validate.notNull(world, "World cannot be null");

    net.minecraft.server.ItemStack stack = new net.minecraft.server.ItemStack(Items.MAP, 1, -1);
    WorldMap worldmap = Items.MAP.getSavedMap(stack, ((CraftWorld) world).getHandle());
    return worldmap.mapView;
}
 

import net.minecraft.server.Items; //导入依赖的package包/类
public static String getTranslationKey(org.bukkit.inventory.ItemStack stack) {
    ItemStack nms = asNMS(stack);
    return nms == null || nms.getItem().equals(Items.a) // Items.a == AIR
           ? null
           : nms.getItem().j(nms) + ".name";
}
 

import net.minecraft.server.Items; //导入依赖的package包/类
/**
 * Bucket methods
 */
public static PlayerBucketEmptyEvent callPlayerBucketEmptyEvent(EntityHuman who, int clickedX, int clickedY, int clickedZ, int clickedFace, ItemStack itemInHand) {
    return (PlayerBucketEmptyEvent) getPlayerBucketEvent(false, who, clickedX, clickedY, clickedZ, clickedFace, itemInHand, Items.BUCKET);
}