I'm at work and don't have my laptop here for specifics, but here is what I did.
1. Open eclipse for the first time and create a worspace. You can use the default or enter your own path. Either way, make note of the path.
2. Open Robotbuilder by double clicking on the jar file.
3. Create a new robot in RB. On the main page put the workspace path into the Eclipse Workspace field.
4. Save and export in RB.
5. Go back to Eclipse. Click on File, Import. In the Import dialog, click the triangle next to General. Then click Existing Projects...
6. After exporting the robot there will now be a folder under the workspace path matching the robot name, select that.
You should now have the robot project in the project explorer.
Check this link for how to have Eclipse automatically refresh code files after they have been modified by RB. You still may have to manually refresh the Eclipse project after adding new source code files from RB. If you add or rename subsystems, commands, etc and you don't see it in Eclipse after exporting from RB, right click the project name and select refresh.
https://wpilib.screenstepslive.com/s...-robot-project