Step 1 添加并注册方块

打开Main，注入新代码

public class Main implements ModInitializer {

    public static final Block FABRIC_BLOCK = new Block(FabricBlockSettings.of(Material.METAL).breakByHand(false).breakByTool(FabricToolTags.PICKAXES, 2).build());

    public static final String MODID = "em";

    @Override
    public void onInitialize() {
        Registry.register(Registry.BLOCK, new Identifier(MODID, "fabric_block"), FABRIC_BLOCK);//注册方块
        Registry.register(Registry.ITEM, new Identifier(MODID, "fabric_block"), new BlockItem(FABRIC_BLOCK, new Item.Settings().group(ItemGroup.BUILDING_BLOCKS)));//将方块注册到ItemGroup中
    }
}

我们打开游戏后，会发现，又是一个黑紫色方块