Glimmer

So, I got this crash after I first loaded up my mod: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Character at wn.a(CraftingManager.java:173) Here's the rest:

Sorry if I'm asking a dumb question or anything, but how do you add a maximum durability to a item? I want to make an Item which takes damege every time you craft somethinng with it, I've already added the recipe where the Item takes damage, which looks like so: GameRegistry.addRecipe(new ItemStack(Item.coal, 4), new Object[] {"i","c", Character.valueOf('c'), Item.ingotIron, Character.valueOf('i'), new ItemStack(crusher, 1, -1) }); And I've added this: @Override public ItemStack getContainerItemStack(ItemStack itemStack) { itemStack.setItemDamage(itemStack.getItemDamage() + 1); return itemStack; to the Item file. So, can anyone help me?