拓展职业能力

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一旦你成功注册了自己的职业，就应该继续前进！你可以希望这个职业可以使用指令来修改，如果你之前使用过原版的Brigadier，那么这个操作对你来讲应该也不难。

假设我们创建一个拥有交易的职业，我们想修改我们职业中的交易物品。

TraderCommand.java

public class TraderCommand {

    public static void register(CommandDispatcher<CommandSourceStack> dispatcher, boolean dedicated) {
        dispatcher.register(literal("trader")
            .then(literal("changeCurrency")
                .then(argument("currency item", ItemStackArgumentType.itemStack())
                    .executes(TraderCommand::changeCurrency)
                )   
            )
        );
    }

    private static int changeCurrency(CommandContext<CommandSourceStack> context) throws CommandSyntaxException {
        // Getting the selected Taterzen
        ServerPlayer player = context.getSource().getPlayer();
        TaterzenNPC npc = ((TaterzenEditor) player).getNpc();
        if(npc != null) {
            // Getting the profession if NPC has it
            TraderProfession profession = npc.getProfession(TraderProfession.ID);
            if(profession != null) {
                ItemStack stack = ItemStackArgumentType.getItemStackArgument(commandContext, "currency item");
                profession.editCurrency(stack);
                return 1;
            }
            // Otherwise send error
            player.sendMessage(Component.literal("This npc doesn't have trader profession :'( ..."), false);
        } else
            player.sendMessage(noSelectedTaterzenError(), false);
        return 0;
    }
}

请确保将指令也记起来了。