How to open an existing project using eclipse

When I started using eclipse, I found a problem, that is, how to open an existing Eclipse project, and I haven't found it in the menu for a long time.
In fact, the results generated by eclipse are not as direct as those generated by VC and jcreator. to open other existing projects in a non-workspace folder, you can open the menu
File-> Import → General → existing project into space.

Select the folder to open in select root directory. If you select copy existing project into workspace, the file will be copied to the workspace at the same time.

Make sure that the. classpath and. project files of eclipse are still running. Otherwise, they cannot be imported. That is to say, the import of Eclipse only recognizes its own items.
If the project to be opened is different from the eclipse configuration, problems may occur during running. Solution:
Choose project> properties to modify the menu. You must modify the Java build path.