Two possibilities:
The MyEclipse version used by the imported project is lower than the current MyEclipse version
The J2SE version used in the project is too low and needs to be upgraded
The upgrade of this project will not have a big impact, it is recommended to follow the prompts.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Two possibilities:
The MyEclipse version used by the imported project is lower than the current MyEclipse version
The J2SE version used in the project is too low and needs to be upgraded
The upgrade of this project will not have a big impact, it is recommended to follow the prompts.