问题

我目前正在使用discord4j开发一个机器人，我想在消息中添加一个反应（表情符号）。
但是我完全不知道如何使用addReaction()方法，而且我找到的每个示例都是使用较旧的版本。
在早期版本的dicord4j中，您可以将表情符号的Unicode表示形式的字符串作为参数传递，但现在它只接受ReactionEmoji类型的对象。我查看了它的方法，除了ReactionEmoji.unicode(String raw)方法外，没有任何方法真正有意义。但是当我尝试使用ReactionEmoji.unicode(String raw)方法时，我收到了“未知表情符号”的错误消息。我尝试了Unicode、实际的表情符号本身，甚至进入了调试模式，在调试模式中添加了一个对消息的反应，然后在调试模式中获取了反应，并复制了反应的原始值，将其粘贴为unicode()方法的输入参数，但它仍然无法将其识别为表情符号。
是否有一些我找不到的文档？
我的代码：

Message msg = channel.createMessage("测试").block();
msg.addReaction("U+2B06").block();

<details>
<summary>英文:</summary>

I&#39;m currently working on a bot with discord4j where I want to add a reaction(emoji) to a message.
But i have no clue, how to use the addReaction() method and every example i find is using an older version.
In earlier versions of dicord4j you could give a string of the unicode representation of the emoji as the parameter, but now it just takes in an object of the type ReactionEmoji. I looked at its methods nothing really makes sense except the ReactionEmoji.unicode(String raw) but then i get the error-message &quot;unknown emoji&quot;. As input of the string i tried the unicode, the actual emoji itself, and i went into debug mode, added a reaction to a message, then took the reaction in debug mode, and copied the raw value of the reaction, pasted it as the input parameter of the unicode() mehtod , but it still didn&#39;t recognize it as an emoji.
Is there some documentation i can&#39;t find?
My code : 

Message msg = channel.createMessage("Test").block();
msg.addReaction("U+2B06").block();

</details>


# 答案1
**得分**: 4

你必须使用[unicode escape][1]来替代：

```java
channel.createMessage("Test")
       .flatMap(msg -> msg.addReaction(ReactionEmoji.unicode("\u2B06")))
       .subscribe();

有关文档，请参阅addReaction和ReactionEmoji。

channel.createMessage("Test")
       .flatMap(msg -> msg.addReaction(ReactionEmoji.unicode("\u2B06")))
       .subscribe();

答案2

得分: 0

对于多个反应

    channel.createMessage("Test").flatMap(msg ->
    msg.addReaction(ReactionEmoji.unicode("🚁"))
       .then(msg.addReaction(ReactionEmoji.unicode("🦲"))))
    .subscribe();

 channel.createMessage("Test").flatMap(msg -> 
 msg.addReaction(ReactionEmoji.unicode("🛑"))
                    .then(msg.addReaction(ReactionEmoji.unicode("🪂"))))
.subscribe();