To rename a project:
From the Window menu, select Open Perspective, and then select Java.
Click the Package Explorer tab.
The Package Explorer view appears.
Right-click a project, select Refactor, and then select Rename.
The Rename Java Project dialog box appears.
In the New Name field, enter the new name for the project.
(Optional) To update entities that reference this project, select Update references.
Typically, you will want to do this to avoid compile errors.
(Optional) To review the list of changes that will be made as a result of the name change, click Preview.
Click OK.