gistfile1.txt

 @SubscribeEvent
    public static void onRegisterItems(final RegistryEvent.Register<Item> event) {
    	final IForgeRegistry<Item> registry = event.getRegistry();
    
    	BlockInit.BLOCKS.getEntries().stream().map(RegistryObject::get).forEach(block -> {
    		final Item.Properties properties = new Item.Properties().group(ItemGroup.BUILDING_BLOCKS);
    		final BlockItem blockItem = new BlockItem(block, properties);
    		blockItem.setRegistryName(block.getRegistryName());
    		registry.register(blockItem);