Could an expert Java programming tutor please take look at my code for me and help me complete it ? I will surely upvote whoever answers! The code just needs some error/exception handling and else statements, the "find" option needs to be filled out, and the variables need to be named.

-this here is the project description

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

- here are the four necessary classes that 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