Java program

Concepts: Classes and objects, inheritance The purpose of this project is to give students exposure to object oriented design and programming using classes and polymorphism in a realistic application that involves arrays of objects and sorting arrays containing objects. You will write several classes for this program. Please submit all classes in one file. The name of the physical program file submitted commonLab Assignment: A veterinarian services many pets and their owners. As new pets are added to the population of pets being serviced, their information is entered into a flat text file. Each month, the vet requests a listing of all pets sorted by their outstanding billi balance. You have to write a program to produce a report of animals and their owners sorted by their outstanding bill balances from the data in the flat text file. Below is a description of the information on the text file: The first entry is the number of animals on the file (numeric) The fields below repeat for each animal: Owner name (String) Birth year (numeric) Bill balance (numeric) o o Species (String) special feature (numeric or string) The animals serviced by the veterinarian are of two types: mammals and non-mammals. For a mammal the special feature field on the flat file is the number of legs of the animal (numeric). For a non-mammal the special feature field is the blood type, warm-blooded or cold-blooded (String). From the information provided, write a solution that includes the following: A suitable inheritance hierarchy which represents the pets serviced by the veterinarian. It is up to you how to design the inheritance hierarchy. I suggest an Animal class and appropriate subclasses. For all classes include the following: o Instance variables o Constructors o Accessor and mutator methods o Suitable toString0 methods