Hello. I am trying to create a recipe that uses an ore dictionary entry, but I keep getting "Null pointer exception" on the recipe definition

 

GameRegistry.addRecipe( new ItemStack( ModItems.itemWheelHub ), new Object[]
						{ "SWS",
						  "WIW",
						  "SWS",
							'S', Items.stick,
							'W', "woodPlank",
							'I', Items.iron_ingot } );

 

Everywhere I look tells me that this is the correct way of using the ore dictionary, but it doesn't seem to be working. If I replace "woodPlank" with Blocks.planks, it will compile and run fine. Doing a debug trace, it looks to me as if the CraftingManager does not recognise a string as a valid entry.

 

Is this correct or can somebody help me please?

 

Using Forge 1.8-11.14.3.1486

My bet is that ModItems.itemWheelHub is not defined (i.e. null)

No, the item is defined and working, testing in creative mode. I am now adding the crafting recipe, and I only get the error when trying to include an ore dictionary entry as one of the ingrediants.

Hi

 

Perhaps try a two step method like this

 

// g) Shaped Ore recipe - any type of tree leaves arranged around sticks makes a sapling
    //    Ores are a way for mods to add blocks & items which are equivalent to vanilla blocks for crafting
    //    For example - an ore recipe which uses "logWood" will accept a log of spruce, oak, birch, pine, etc.
    //    If your mod registers its balsawood log using  OreDictionary.registerOre("logWood", BalsaWood), then your
    //    BalsaWood log will also be accepted in the recipe.
    IRecipe saplingRecipe = new ShapedOreRecipe(new ItemStack(Blocks.sapling), new Object[] {
            "LLL",
            "LSL",
            ".S.",
            'S', Items.stick,   // can use ordinary items, blocks, itemstacks in ShapedOreRecipe
            'L', "treeLeaves",  // look in OreDictionary for vanilla definitions
    });
    GameRegistry.addRecipe(saplingRecipe);

 

If that doesn't work, keep breaking it into smaller pieces

eg ItemStack saplingStack = new ItemStack(Blocks.sapling)

etc

perhaps stepping in with the debugger will help too

 

This is running in init not preInit, yes?

 

-TGG

I think your woodPlank should be plankWood.  This is what I have for ore dictionary recipe in my 1.8 mod.

 

		for(ItemStack s : OreDictionary.getOres("plankWood"))
	{
		GameRegistry.addRecipe(new ItemStack(TEBlocks.woodenDrawBridge), new Object[]{"SSS", "III","SSS", 'S', (s), 'I', Blocks.iron_block});

	}

Thanks GreyGhost. Your post showed me where I went wrong following your "MinecraftByExample"

 

I had started by making a regular crafting recipe for initial testing, but didn't see that the function call had changed when looking at the ore dictionary version. It all works now.