Autocomplete feature problem 'File Not Found' error

I have a basic java code where I am using inheritance.
It seems like extension is unable to get doc-strings and other verbose information.

As compared to the normal execution where when you hover over the object instance or class name you are given the various details of the constructor, in this case it doesn't.

Although the code works but all the autocomplete features gets disabled.

The server says File Not Found

Environment

• ElementaryOS:
• javac 1.8.0_171:
• 1.23.1:
• 0.25.0

Folder with all files to reproduce error

The log file is in the folder.
The error seems to come from Car.java file in the Demo.java file.

下载 issue 中链接的复现文件夹并检查其中的日志，从 Car.java 与 Demo.java 的交互开始。先在 Java extension 中复现 File Not Found 错误，然后跟踪失败的 autocomplete 或 hover 请求；当继承类型能够提供文档和详细信息，且不会禁用 autocomplete 时，即视为完成。