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In a package named "lecture10", implement the following. Lecture Question class Battery with A constructor that takes a variable named "charge" of type Int. • abstract class Electronic with • A constructor that takes no parameters. • A state variable named "battery" of type Battery. • A method named "use" that takes no parameters and returns Unit (this can be abstract). • A method named "replaceBattery" that takes a Battery as a parameter and returns a Battery. • This method swaps the input Battery with the Battery currently stored in this Electronic's state variable. • The returned Battery is the one that was in the state variable when the method is called. class Flashlight that extends Electronic. • A constructor that takes no parameters • When a new Flashlight is created, assign the inherited state variable named "battery" to a new Battery with 5 charge (ie. Batteries included). • Override the "use" method to reduce the charge of the battery in the state variable by 1 if its charge is 1 or greater. class BoomBox that extends Electronic. A constructor that takes a variable of type Battery and assigns it to the inhmerited state variable named "battery". Your BoomBox constructor parameter should have a different name than the state variable. • Override the "use" method to reduce the charge of the battery in the state variable by 3 if its charge is 3 or greater.

In a package named "lecture10", implement the following. Lecture Question class Battery with A constructor that takes a variable named "charge" of type Int. • abstract class Electronic with • A constructor that takes no parameters. • A state variable named "battery" of type Battery. • A method named "use" that takes no parameters and returns Unit (this can be abstract). • A method named "replaceBattery" that takes a Battery as a parameter and returns a Battery. • This method swaps the input Battery with the Battery currently stored in this Electronic's state variable. • The returned Battery is the one that was in the state variable when the method is called. class Flashlight that extends Electronic. • A constructor that takes no parameters • When a new Flashlight is created, assign the inherited state variable named "battery" to a new Battery with 5 charge (ie. Batteries included). • Override the "use" method to reduce the charge of the battery in the state variable by 1 if its charge is 1 or greater. class BoomBox that extends Electronic. A constructor that takes a variable of type Battery and assigns it to the inhmerited state variable named "battery". Your BoomBox constructor parameter should have a different name than the state variable. • Override the "use" method to reduce the charge of the battery in the state variable by 3 if its charge is 3 or greater.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Lecture Question 10 continued:

Your Flashlight and BoomBox classes must inherit Electronic. This will be checked by storing them in variables of type Electronic.

val flashlight1: Electronic = new Flashlight()

val boomBox1: Electronic = new BoomBox(new Battery(10)

In a package named "lecture10“, implement the following. Lecture Question class Battery with • A constructor that takes a variable named "charge" of type Int. • abstract class Electronic with • A constructor that takes no parameters. • A state variable named "battery" of type Battery. A method named "use" that takes no parameters and returns Unit (this can be abstract). • A method named "replaceBattery" that takes a Battery as a parameter and returns a Battery. • This method swaps the input Battery with the Battery currently stored in this Electronic's state variable. • The returned Battery is the one that was in the state variable when the method is called. • class Flashlight that extends Electronic. • A constructor that takes no parameters When a new Flashlight is created, assign the inherited state variable named "battery" to a new Battery with 5 charge (ie. Batteries included). Override the "use" method to reduce the charge of the battery in the state variable by 1 if its charge is 1 or greater. class BoomBox that extends Electronic. • A constructor that takes a variable of type Battery and assigns it to the inhherited state variable named "battery“. Your BoomBox constructor parameter should have a different name than the state variable. Override the "use" method to reduce the charge of the battery in the state variable by 3 if its charge is 3 or greater.
Transcribed Image Text:In a package named "lecture10“, implement the following. Lecture Question class Battery with • A constructor that takes a variable named "charge" of type Int. • abstract class Electronic with • A constructor that takes no parameters. • A state variable named "battery" of type Battery. A method named "use" that takes no parameters and returns Unit (this can be abstract). • A method named "replaceBattery" that takes a Battery as a parameter and returns a Battery. • This method swaps the input Battery with the Battery currently stored in this Electronic's state variable. • The returned Battery is the one that was in the state variable when the method is called. • class Flashlight that extends Electronic. • A constructor that takes no parameters When a new Flashlight is created, assign the inherited state variable named "battery" to a new Battery with 5 charge (ie. Batteries included). Override the "use" method to reduce the charge of the battery in the state variable by 1 if its charge is 1 or greater. class BoomBox that extends Electronic. • A constructor that takes a variable of type Battery and assigns it to the inhherited state variable named "battery“. Your BoomBox constructor parameter should have a different name than the state variable. Override the "use" method to reduce the charge of the battery in the state variable by 3 if its charge is 3 or greater.
Lecture Question In a package named "lecture11“, implement the following to expand the Flashlight/ BoomBox functionality from the previous lecture question. Full functionality from the previous lecture question is required. Classes Battery, Electronic, BoomBox, and Flashlight as defined in the previous lecture question. • An object named UseElectronics with • a method named "useAll" that takes a List of Electronics as a parameter and returns Unit. Calls the "use" method on all the Electronics in the input list. [Notice that the specific method that is called depends on whether the Electronic is a BoomBox or a Flashlight]. A method named "swapBatteries" that takes two Electronics as parameters and returns %3D Unit. Exchanges the batteries between the two Electronics. Testing: In a package named "tests" create a Scala class named "TestElectronics" as a test suite that tests all the functionality listed above.
Transcribed Image Text:Lecture Question In a package named "lecture11“, implement the following to expand the Flashlight/ BoomBox functionality from the previous lecture question. Full functionality from the previous lecture question is required. Classes Battery, Electronic, BoomBox, and Flashlight as defined in the previous lecture question. • An object named UseElectronics with • a method named "useAll" that takes a List of Electronics as a parameter and returns Unit. Calls the "use" method on all the Electronics in the input list. [Notice that the specific method that is called depends on whether the Electronic is a BoomBox or a Flashlight]. A method named "swapBatteries" that takes two Electronics as parameters and returns %3D Unit. Exchanges the batteries between the two Electronics. Testing: In a package named "tests" create a Scala class named "TestElectronics" as a test suite that tests all the functionality listed above.
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