[hardwired]

Numbers 6 and 7 in reply #18 can be done in your ProjectDefinition class.
Number 8 is done in the PC class of #16 or in your ProjectController class of #14.
If you display the input data for each trip through the while loop you won't need to use arrays.
The need for an array comes when you want to store/keep_track_of each new ProjectDefinition instance created from/with the info entered during each trip through the while loop.

My problem is changing the controller code to work with it

Code:

public class PC {
    public static void main(String[] args){
        DataAcquisition dataAcqn = new DataAcquisition();
        while(user_wants_to_enter_more_data) {
            // Create another PersonData:
            String[] data = dataAcqn.getData();
            ProjectDefinition person = new ProjectDefinition(data);
            System.out.println("person = " + person);
            // show data in JOptionPane(...
            // check with user for exit_loop/another_round_of_data
        }
    }
}