Eclipse usage and tips -- an error is reported when importing the project (already exist in the workspace)

When we import the same project multiple times, starting from the second time, eclipse will prompt "some projects cannot be imported because they already exist in the workspace" during the import ".This is because we have already imported this project and cannot import it again. The solution is simple, that is, rename the project that has been imported to workspace.

Right-click the previously imported project → refactor → rename, and modify a name for it in the pop-up window. If you import the same project again, eclipse will not return an error.