With the ItemBuilder class you can create and modify an ItemStack in just one line of code! The ideal solution if you just need to quickly create an item.
You can now create an Item in only one line. Since you only have one line the possibilities to modify it are restricted. You can however still access all of the usual Item methods to modify it.
Code (Text):
// Example on how to add an item to a player inventory with a custom name in one line
CraftRecipe recipe = new CraftRecipe(new ItemStack(Material.DIAMOND), ingredients, "DiamondRecipe", this);
Material mat = recipe.getIngredient(CraftingSlot.ROW2_COLUMN2); // Get Item you have to put into middle slot of the workbench
recipe.setIngredient(mat, CraftingSlot.ROW1_COLUMN1); // Set item in middle slot of workbench
You can now use the new Item class. It works similar to ItemStacks but has the ItemMeta methods as well so you don't have to create ItemMetas for your ItemStacks anymore.