Intellij IDEA attempts to appeal to the wide Java fanbase which uses Eclipse for their development by allowing developers to migrate their Eclipse projects over to an IDEA structure with a few simple clicks!
First, start IDEA and click Import Project from the startup window:
Then, select your Eclipse project using the explorer window

Intellij will prompt you for the model you are importing from, make sure Eclipse is selected before clicking Next

The next screen will show a confirmation of the path you want to import, simply click Next:

Next, select the modules you want created. In the particular example project, only the Alice and the BuggyRos projects mattered when working in Eclipse

Finally, make sure the correct version of the JDK is selected before Finishing

And the Eclipse project has been fully migrated to Intellij! The project will still open in both IDEs, and will be fully functional in both