@Override
    public void onSlashCommandInteraction(@NotNull SlashCommandInteractionEvent event) {
        if(event.getInteraction().getName().equals("equation")){
            Equation equation = null;
            try {
                equation = randomEquation();
            } catch (Exception e) {
                e.printStackTrace();
            }
            int answer = equation.getAnswer();
            System.out.println(answer);
            String equationString = equation.getEquation();
            MessageEmbed embed = new EmbedBuilder()
                    .setTitle("Solve this equation:")
                    .addField(equationString, "Be the first one to do it! \n Just send in the answers to this channel.", false)
                    .setColor(Color.YELLOW)
                    .build();
            event.getChannel().asTextChannel().sendMessageEmbeds(embed).queue(message -> {
                String messageId = message.getId();
                String channelId = message.getChannel().getId();
                String channelTopic = event.getChannel().asTextChannel().getTopic();
                saveEquationToMongo(equationString, answer, messageId, channelId, channelTopic);
                TextChannel channel = event.getChannel().asTextChannel();
                channel.getManager().setTopic("Currently playing the Equations Game...").queueAfter(500, TimeUnit.MILLISECONDS);
            });
           // event.reply(equationString  + " = " + answer).queue();
        }
    ```
</details>
# 答案1
**得分**: 2
你每 10 分钟只能更改频道主题两次。你所观察到的是 *警告* 而不是 *错误*，如日志级别 WARN 所示。
此外，对于斜杠命令交互，你应该使用 `event.reply(...)` 而不是向频道发送消息。
<details>
<summary>英文:</summary>
You can only change the channel topic twice every 10 minutes. What you are observing is a *warning* not an *error*, as indicated by the log level WARN.
Additionally, for a slash command interaction, you are supposed to use `event.reply(...)` instead of sending a message to the channel.
</details>