Question

Java file

Name Dog Classes and Methods

Create a constructor that incorporates the type, breed, and name variables (do not include topTrick).
Note: The type refers to what the breed typically does; for example, a corgi would be a “cattle herding dog.” A Shiba Inu would be a “hunting dog.”

Create the setTopTrick() mutator method

Dog is parent class

Corgi and Driver are subclasses

Complete the Corgi class:

1. Using the UML Class diagram, declare the instance variables.
2. Create the two mutator methods for the instance variables.

Driver is subclass

then create the code:

1. There should be no instance variables.
2. The main() method will be the only method in the class.
3. Write three lines of code in the main() method:
   1. Instantiate a corgi object using the below syntax:

className objectName = new className(input parameters)

2. TIP: Refer to the constructors in the Dog and Corgi classes to ensure the input parameters are correct.
3. Use the objectName.setTopTrick() method to set a top trick for the dog you created.
4. Embed the objectName.toString() method in a statement that outputs to the console window.

Sample output:

DOG DATA

Java is a Pembroke Welsh Corgi, a cattle herding dog.

The top trick is: ringing the bell to go outside.

The Corgi is 5 years old and weighs 38 pounds.

Dog
type: string breed: string name: string topTrick: string
setTopTrick(trick:string) toString()

Corgi
weight:int age:int
setWeight(pounds:int) setAge(years:int) toString()

Arrow pointing from table labeled Corgi to table labeled Dog

1^st program : Parent Dog

public class Dog {

    // instance variables

    // constructor

    // methods

    // method used to print Dog information

    public String toString() {

        String temp = "\nDOG DATA\n" + name + " is a " + breed +

                ", a " + type + " dog. \nThe top trick is : " +

                topTrick + ".";

        return temp;

    }

}

2^nd program Corgi

public class Corgi extends Dog {

    // additional instance variables

    // constructor

    public Corgi(String type, String breed, String name, int pounds, int years) {

        // invoke Dog class (super class) constructor

        super(type, breed, name);

        weight = pounds;

        age = years;

    }

    // mutator methods

    // override toString() method to include additional dog information

    @Override

    public String toString() {

        return (super.toString() + "\nThe Corgi is " + age +

                " years old and weighs " + weight + " pounds.");

    }

}

3^rd program Driver (CockerSpaniel)

public class Driver extends Dog {

    // additional instance variables

    // constructor

    public Driver(String type, String breed, String name, int pounds, int years) {

        // invoke Dog class (super class) constructor

        super(type, breed, name);

        weight = pounds;

        age = years;

    }

    // mutator methods

    // override toString() method to include additional dog information

    @Override

    public String toString() {

        return (super.toString() + "\nThe Cocker Spaniel is " + age +

                " years old and weighs " + weight + " pounds.");

    }

}

Answer 1

SOURCE CODE IN JAVA:

Dog.java

public class Dog

{

// instance variables

private String type, breed, name, topTrick;

// constructor

public Dog(String type, String breed, String name)

{

this.type=type;

this.breed=breed;

this.name=name;

}

// methods

void setTopTrick(String trick)

{

this.topTrick=trick;

}

// method used to print Dog information

public String toString() {

String temp = "\nDOG DATA\n" + name + " is a " + breed +", a " + type + " dog. \nThe top trick is : " +topTrick + ".";

return temp;

}

}

Corgi.java

public class Corgi extends Dog

{

// additional instance variables

private int weight, age;

// constructor

public Corgi(String type, String breed, String name, int pounds, int years)

{

// invoke Dog class (super class) constructor

super(type, breed, name);

weight = pounds;

age = years;

}

// mutator methods

public void setWeight(int pounds)

{

this.weight=pounds;

}

public void setAge(int years)

{

this.age=years;

}

// override toString() method to include additional dog information

@Override

public String toString()

{

return (super.toString() + "\nThe Corgi is " + age +" years old and weighs " + weight + " pounds.");

}

}

Driver.java

public class Driver extends Dog

{

// additional instance variables

private int weight, age;

// constructor

public Driver(String type, String breed, String name, int pounds, int years)

{

// invoke Dog class (super class) constructor

super(type, breed, name);

weight = pounds;

age = years;

}

// mutator methods

public void setWeight(int pounds)

{

this.weight=pounds;

}

public void setAge(int years)

{

this.age=years;

}

// override toString() method to include additional dog information

@Override

public String toString()

{

return (super.toString() + "\nThe Cocker Spaniel is " + age +" years old and weighs " + weight + " pounds.");

}

}

Main.java

class Main

{

public static void main(String[] args)

{

//testing the classes

Corgi c=new Corgi("cattle herding","Pembroke Welsh Corgi","Java",38,5);

c.setTopTrick("ringing the bell to go outside");

System.out.println(c);

}

}

OUTPUT: