KeyValue

key: int

value: double

setKey$(($at$)$:void

getKey $()$:int

setValue$($double$)$:void getValue$()$:double

Notes:

ocAbstract class DataCollection

#Datal$]$: KeyValue

final CAP: int$(20)$

$+$insert KeyValue$)$:void remove$()$:void

Interfacess

Scrambler

swapperfint, Int$)$ veld

DataBook

sire: int getAverage$()$ double $*$shuffle$()$:void

$1.$ Scrambler: an interface with one method

$2.$ Key Value class:

Assume this class is completely implemented, DO NOT code it$.$ Use its methods when you code the other classes.

$3.$ DataCollection:

Its insert and rensove methods are abstract

Create a constructor for this class that creates Data with size equal to CAP

$4.$ DataBook:

Data: stores "size" Key Value objects, and cannot store more than CAP objects.

getAverage: returns the average of all Key Value objects in the array Data in terms of their "value" values. shuffle: calls the swapper method $5$ times, each time it gets the indices of

the two Key Value objects to be swapped from the user using a Scanner to read from the keyword. Each index must be between $0$ and size$-1$ inclusive, if the user fails to provide a valid index, the call to swapper is skipped. swapper$($int$1,$ int$2)$: exchanges the two Key Value objects stored at the indices int$1,$ and int$2$ in Data

insert: adds a Key Value object at the end of Data, if size