(The eclipse project reported an error, but all the files in it did not report an error. I don't know why.
Check the problem. There are errors in it
It is said that the asking price of a class is incomprehensible. This file is directly pulled in by me locally. Eclipse doesn't work well and reports an error.
The solution is very simple. Create a new class and copy the code into it.
To sum up, eclipse has a variety of headaches. It's a good thing that you can check for errors in the problem.
)