Dear expert object-oriented programming tutor, if it's not too much to ask, could you please take look at my code, specifically the Project4.java class, and just add some error/exception handling and else statements, fill out the "find" option, and name the variables ? For whoever does it, I'll be happy to help you with an up-vote !

-Here is the project description

https://www.dropbox.com/s/mj3zrlsczy2w8wv/Project%204.pdf?dl=0

- here are the four necessary classes I created

https://www.dropbox.com/s/u67qbipeyjzcyy9/Project4.java?dl=0

https://www.dropbox.com/s/czwb6v3tz85y4qm/Property.java?dl=0

https://www.dropbox.com/s/s20zw6limloylso/StateChangeable.java?dl=0

https://www.dropbox.com/s/mdv8djlujepsjzo/Status.java?dl=0

-and here is just a visual of how this class design is supposed to work,as well as an image of what the user interface/dialog box should look like

https://www.dropbox.com/s/5ju4fcibgubd1zz/Screen%20Shot%20.png?dl=0

https://www.dropbox.com/s/vqazruqmub3fq0a/Screen%20Shot%202.png?dl=0