Hi, I need help with 4 simple and short methods so my JAVA code is finished. Mostly I want to get how to fix the sort method as it uses JOptionPane, which is new to me. So full detail on how to use that import javax.swing.JOptionPane; would be nice. You may import more like import java.util.Arrays; or anything els if need but explain in that case why. I have attached photos of all of the codes and the instruction/task for the 4 methods that needed to be fixed. Also, check that it works correctly by running the class Lab5 so you get the same as the photo Result. You are not allowed to change anything els in any classes or methods or variabels Except for the sort method ofc.

[The Task]

[Class Apartment]

[Interface CityProperty]

[Class Building]

[ Class Cottage]

[Class Villa]

[Class Lab5]

[Class EstateAgent]