alibaba / alibaba/fastjson2

[BUG]kotlin 反射失败

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bug
Dominant language
Java
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Description

### 问题描述
*简要描述您碰到的问题。*
```
Incorrect resolution sequence for Java method kotlin 。
因为
public boolean containsKey(String key) {
return super.containsKey(key);
}

@Override
public boolean containsKey(Object key) {
if (key instanceof Number
|| key instanceof Character
|| key instanceof Boolean
|| key instanceof UUID
) {
return super.containsKey(key) || super.containsKey(key.toString());
}

return super.containsKey(key);
}怎么会有这种定义
```

### 环境信息
*请填写以下信息:*

- OS信息: [e.g.:CentOS 8.4.2105 4Core 3.10GHz 16 GB]
- JDK信息: [e.g.:Openjdk 1.8.0_312]
- 版本信息:[e.g.:Fastjson2 2.x.x]

### 重现步骤
*如何操作可以重现该问题:*

1. 使用 `xxx.xxx` 方法
2. 输入 `...` 数据
3. 出现 `...` 错误
```java
//可在此输入示例代码
```

### 期待的正确结果
*对您期望发生的结果进行清晰简洁的描述。*

### 相关日志输出
*请复制并粘贴任何相关的日志输出。*

#### 附加信息
*如果你还有其他需要提供的信息,可以在这里填写(可以提供截图、视频等)。*

Contributor guide

Open the contributing guide

Research direction

The issue names no source file, test, method, reproducible input, or environment details. Start by obtaining the missing JDK, Fastjson2 version, Kotlin version, operation, and minimal Java/Kotlin example, then locate the reflection-resolution path involved. Done means reproducing the failure, identifying the incorrect resolution sequence, and adding a regression test for the reported case.

Written by the indexing model from the issue text.

Assessment

Tech stack
java, kotlin
Domain
backend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
20/100

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