PlayfulPets $(70)$

Pet class

This class has a static List variable of type Pet named pets that is instantiated as an ArrayList. This class has the following private instance variables:

String name

String animal

String breed

String color

double price

Each instance variable has a simple mutator and accessor.

There is a default constructor that does nothing.

There is a second constructor with parameters for each of the five instance variables. It calls the mutator for each parameter in order to set the corresponding instance variable. There is a toString method that prints out a line like this:

Max: a black poodle dog purchased for $$540\mathrm{.}50$

There is an equals method that returns true if the item being compared with is also a Pet and if the animal and breed are the same.

PetMatcher interface

PetMatcher is a functional interface with both an abstract and default method.

method matchPet is the abstract method $($don$$t use the word abstract since we are in an interface.$)$ This method returns a List of type Pet and has a Pet as an input parameter

default method firstPet has an input of type Pet and a return value of type Pet. Get the index of the first matching Pet in Pet.pets $($the ArrayList in Pet$)($use indexOf$)$ if the index is less than $0($indexOf does this for you$)$

return null

else

return a reference to the Pet at that index

PlayfulPets class

This class has a main method and one additional method called matchPet. It also creates two different implementations of the PetMatcher$$s functional interface$$s abstract method.

method main

Create five Pets and add them to the Pet.pets $($the static ArrayList of Pet$)$

You can use the following:

$$Scruffy$",$"dog","poodle","white",$895\mathrm{.}00$

$$Meow$",$"cat","siamese","white",$740\mathrm{.}25$

$$Max$",$"dog","poodle","black",$540\mathrm{.}50$

$$Cuddles$",$"dog","pug","black",$1282\mathrm{.}75$

$$Slider$",$"snake","garden","green",$320\mathrm{.}00$

Please use a Lambda Expression for breedMatcher

Create a new PetMatcher called breedMatcher that implements petMatch returning a List of all those Pets of the same breed. In this case we don$$t override the firstPet method.

The following instances of PetMatcher $($priceMatcher and color Matcher$)$ can be done using inner classes; This is necessary in order to override the default method the easiest way.

Create a new PetMatcher called priceMatcher that implements petMatch returning a List of all those Pets less than or equal to the price of the input parameter Pet. priceMatcher also overrides the firstPet method, creating a new firstPet that searches Pets.pet for a Pet less than or equal to the price of the input Pet, returning a reference to the first such instance of such a Pet. If no such Pet exists return null.

Create a new PetMatcher called colorMatcher that implements petMatch returning a List of all those Pets equal to the color of the input parameter Pet.$($Remember color is a String so use the equals method on the colors.$)$ colorMatcher also overrides the firstPet method, creating a new firstPet that searches Pets.pet for a Pet with a color that equals the color of the input Pet, returning a reference to the first such instance of such a Pet. If no such Pet exists return null.

Make the following calls in main:

matchPetsFromTheList$("$Poodles$",$breedMatcher, new Pet$($null$,$ "dog", "poodle", null, $0\mathrm{.}0))$; matchPetsFromTheList$("$Pets for $$700$ or less",priceMatcher, new Pet$($null$,$ null, null, null, $700\mathrm{.}0))$;

matchPetsFromTheList$("$Pets that are white",colorMatcher, new Pet$($null$,$ null, null, "white", $0\mathrm{.}0))$;

$6$

method matchPetsFromTheList has a void return and three parameters $$ String criteria, PetMatcher matcher and Pet called myPet. Note: The second parameter allows you to send code as a parameter.

In this method you will first use matcher with firstPet to print out the first Pet. Then create a List with all the matches using the matcher and print out the results.

Sample output for this example:

Poodles:

First: Scruffy: a white poodle dog purchased for $$895\mathrm{.}00$

All matches:

Scruffy: a white poodle dog purchased for $$895\mathrm{.}00$

Max: a black poodle dog purchased for $$540\mathrm{.}50$

Pets for $$700$ or less:

First: Max: a black poodle dog purchased for $$540\mathrm{.}50$

All matches:

Max: a black poodle dog purchased for $$540\mathrm{.}50$

Slider: a green garden snake purchased for $$320\mathrm{.}00$

Pets that are white:

First: Scruffy: a white poodle dog purchased for $$895\mathrm{.}00$

All matches:

Scruffy: a white poodle dog purchased for $$895\mathrm{.}00$

Meow: a white siamese cat purchased for $$740\mathrm{.}25$