Question

Chapter 5 Assignment

Read directions: In JAVA design and implement a class called Dog that contains instance data that represents the dog's name and dog's age. Define the Dog constructor to accept and initialize instance data. Include getter and setter methods for the name and age. Include a method to compute and return the age of the dog in "person years" (seven times age of dog. Include a toString method that returns a one-time description of the dog (example below). Create a driver class Kennel, whose main() method instantiates and updates several Dog objects.

You are to create a program with a class call: Dog, and a driver class named: Kennel.

You have instance data for dog's name and dog's age. Methods including the constructor, some "getters" and "setters" for name and age. Additional method to calculate the dog's age in human years *7.    Include a "toString" method to return a one-line description of dog.

Points:

   (2 points) Create a Kennel class

     (2 points) Create Dog class

   (2 points) Create constructor method to accept and initialize instance data (dog name and age)

   (4 points) instantiate four objects (instances) of Dog, setting up each dog (4 dogs).

   (4 points) create setters and getters method (ex: setName("Maxine") changes dog name, getName() returns name

   AND getAge() returns age, and setAge(7) sets the age of dog).

   (3 points) use toString() method to print dog's name and age when called by println()

     (3 points) print 4 statements for other information not using toString() including dog's age including picking one dog and say "Happy Birthday".

   (2 points) calculate dog's age in person years (method to do this)

   (8 points) program works :     

        (Total of 2 classes (Kennel, Dog). Dog class has 7 methods (Dog, setName, getName, setAge, getAge, calcHumanYears, to_String))

                 FIRST: Print out all 4 dog's name and its age

   Each dog should be printed out with the dog information using "to_String" for print.

   SECOND: Print and give following info:

   a) allow the change of name and change of dog's age (you pick any dog to do each)

   b) for all dogs, print line include: " The dog's name is Maxine, and you are now 35 in human years " (use method to get dog's name and use method to calculate his age-in-human-years)

   c) print another line for ONE dog could be: " Today is: Wishbone's birthday. Happy Birthday Wishbone!! "    (use method to get dog's name and the age-in-human-years in the println)

   (-5 points) if no comments or messy

**** Sample output **********************************

Max is the best dog. Age: 5
Lucky is the best dog. Age: 9
Wishbone is the best dog. Age: 3
Jellybean is the best dog. Age: 1

The dog's name is not Max, it's Maxine.
The dog's age is not 1, Jellybean is 2.

The dog's name is Maxine, and you are now 35 in human years.
The dog's name is Lucky, and you are now 63 in human years.
The dog's name is Wishbone, and you are now 21 in human years.
The dog's name is Jellybean, and you are now 14 in human years.

Today is: Wishbone's 21 birthday. Happy Birthday Wishbone!!

Answer 1

Program plan: . Define the class Dog with data members to store age and name of dog. . Define member functions setter, getter for data member and toString method to display details. .Driver class to test Book class by creating several objects.

Program: Defining a class Dog which contains a instance variables to store age and name. Constructor * Initialize data members include all setter, getter and tostring methods olass Dog //instance data private int Age: private String Name: //default constructor public Dog ) Age-0i Name=" " ; //parameterized constructor public Dog (String name, int age) Name-name: Age-age: //getter methods //Method returns name of dog public String getNameO return Name; // Method returns age of dog public int getAge return Age //setter methods // Method sets name of dog public void setName (String dogname) Namedogname: /7 Method sets age of dog public void setAge (int dogage) Age-dogage: Method person Years return the age of dog in person years public int personYears ) return Age 7; Method returns string containing dog details. public String tostring ) return "The dog name is "+Namet"nAge is "+Age:

* Driver class 'Kennel' instantiates objects of class dog and updates values. * Compile: javac kennel.java Run java kennel. public class Kennel public static void main (String[] args) //creating three objects Dog dgl-new Dog ("Floppy", 3) Dog dg2-new Dog ("Julie", 6) Dog dg3-new Dog ) //setting values for object dg3 dg3.setAge (12) dg3.setName (" Johnny") //Displaying dogs details System.out.println (dg1+"n Age in person years" +dg1.personYears)) //Displaying dogs details System.out.println (dg2+"n Age in person years" +dg2.personYears )) //Displaying dogs details System.out.println (dg3+n Age in person years" +dg3.personYears))i

Sample Output: The dog name is Floppy Age is 3 Age in person years 21 The dog name is Julie Age is 6 Age in person years 42 The dog name is Johnny Age is 12 Age in person years 84