I'd like help coding this problem, thnank you. Java in Eclipse

Introduction:

Everyone is familiar with a television. It is the object we are going to create in this lab.

First we need a blueprint. All manufacturers have the same basic elements in the televisions

they produce as well as many options. We are going to work with a few basic elements that are common

to all televisions. Think about a television in general. It has a brand name (i.e. it is made by a specific

manufacturer). The television screen has a specific size. It has some basic controls. There is a

control to turn the power on and off. There is a control to change the channel. There is also a

control for the volume. At any point in time, the televisions state can be described by how these

controls are set.

We will write the Television

class. Each object that is created from theTelevision class must be able to hold information about that instance of a

Television in its fields. So a

Television

object will have the following attributes:

manufacturer

. The

manufacturer

attribute will hold the brand name. This cannot

change once the television is created, so

it

will be a named constant.

screenSize

. The

screenSize

attribute will hold the size of the television screen. This

cannot change onc

e the television has been created so

it

will be a named constant.

powerOn

. The

powerOn

attribute will hold the value true if the power is on and false if the

power is off.

channel

. The

channel

attribute will hold the

numeric integer

value of the station

that the

television is showing.

volume

. The

volume

attribute will hold a number value representing the loudness (0 being

no sound).

These attributes become

fields

in our class.

The

Television

object will also be able to control the state of its attributes. These controls

become methods in our class.

setChannel

. The

setChannel

method will store the desired station in the channel field.

power

. The

power

method will toggle the power between on

and off, changing the value

stored in the

powerOn

field from

true

to

false

or from

false

to

true

.

increaseVolume

. The

increaseVolume

method will increase the value stored in the

volume field by 1.

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of

6

decreaseVolume

. The

decreaseVolume

method will decrease t

he value stored in the

volume field by 1.

getChannel

. The

getChannel

method will return the value stored in the channel field.

getVolume

. The

getVolume

method will return the value stored in the volume field.

getManufacturer

. The

getManufacturer

method

will return the constant value stored

in the MANUFACTURER field.

getScreenSize

. The

getScreenSize

method will return the

numeric integer

constant

value stored in the SCREEN_SIZE field.

We will also need

two overloaded

constructor methods that will be used to create an instance of a

Television

.

One constructor method will receive via its parameters the

manufacturer

name and the

screen

size

.

Additionally,

t

he constructor method will

initialize

the remaining attribute

fields to the following default values:

powerOn

will be initialized to

false

,

volume

will

be initialized to 20 and

channel

will be initialized to 2.

One constructor method will receive via its parameters the values for all of th

e attribute

fields.

It will use those parameter values to initialize all of its attribute fields.

These ideas can be brought together to form a UML (Unified Modeling Language) diagram for this

class, as shown below.

Television

-

MANUFACTURER: String

-

SCREEN_SIZE: int

-

powerOn: Boolean

-

channel: int

-

volume: int

+ Television(brand: String, size: int):

+ Television(brand: String, size: int

,

p

o

w

e

r

:

B

o

o

l

e

a

n

,

s

t

a

t

i

o

n

:

i

n

t

,

s

o

u

n

d

L

e

v

e

l

:

i

n

t

):

+ setChannel (station: int

): void

+ power( ): void

+ increaseVolume( ): void

+ decreaseVolume( ): void

+ getChannel( ): int

+ getVolume( ): int

+ getManufacturer( ): String

+ getScreenSize( ): int

Class Name

Attributes or fields

Methods

+ public

-

private

NOTE:

field names in all

upper

case are constants

and not variables.

NOTE:

not always do setter/mutator methods begin with the prefix of se

t. See examples:

power, increaseVolume, decreaseVolume methods.

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3

of

6

Starting Instructions:

1.

In your Eclipse lab workspace, create a new java project and name it

LastNameFi

-

Lab0

6

Proj

(i.e.

SmithJ

-

Lab06Proj)

.

2.

Download from the D2L > LabMaterial

> LabExer0

6

Module the

TelevisionDemo

.java

source

code file

.

3.

Wait to

import this

TelevisionDemo

.java

source code file into

the

Eclipse

project

until told to do

so in a later task in this exercise.

4.

Begin your work with Task #1, which will create a new

class that will be the model for a

Television real world entity.

Task #

1

Create a New Class

1.

Create a new class called

Television

within this project. This class will be the definition

of a Television entity and thus

will not

contain a main method.

2.

Put the following header comment at the top of the class file.

//*********************************************

//

Class

:

class name

//Date:

month/year

//Author:

programmers name

//***********************************

**********

3.

Declare the 2 constant fields listed in the UML diagram.

4.

Declare the 3 remaining fields listed in the UML diagram.

5.

Write a comment for each field indicating its purpose or contents

6.

Save this file, which will compile the code. Fix any syntax

errors before proceeding.

7.

Do not run

remember there is no main method present in which to start the execution.

Task #

2

A Write a Constructor Method

1.

Create a constructor method definition that has two parameters, a manufacturers brand

and a screen

size. These parameters will bring in information to this method. Remember a

constructor method has the same name as the class and has no return data type

and has no

void keyword.

2.

Inside the constructor, assign the values taken in from the parameters to the corresponding

attribute fields.

3.

Initialize the

powerOn

field to

false

(power is off), the

volume

to 20, and the

channel

to 2.

4.

Write comments in Javadoc format describing the

purpose of the constructor method above

the method header and commenting the parameters with @param tags.

5.

Save this file, which will compile the code. Fix any syntax errors before proceeding.

6.

Do not run.

Task #

2B Write a Second Overloaded Construc

tor Method

1.

Create a constructor method definition that has

five

parameters

that provide the following:

a manufacturers brand

, a

screen size

, a power on/off Boolean indicator, a channel value

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6

and a volume value

. These parameters will bring in informatio

n to this method. Remember

a constructor method has the same name as the class and has no return data type

and has

no

void keyword.

2.

Inside the constructor, assign the values taken in from the parameters to the corresponding

attribute fields.

3.

Write com

ments in Javadoc format describing the purpose of the constructor method above

the method header and commenting the parameters with @param tags.

4.

Save this file, which will compile the code. Fix any syntax errors before proceeding.

5.

Do not run.

Task

#

3

Write

the class methods that define the behaviors

1.

Define accessor methods called

getVolume

,

getChannel

,

getManufacturer

, and

getScreenSize

that return the value of the corresponding field.

2.

Define a

mutator

method called

setChannel

that accepts a value to be stored in the

channel field.

3.

Define a

mutator

method called

power

that changes the state from

true

to

false

or

from

false

to

true

. This can be accomplished by using the

NOT

operator (

!

-

the

exclamation symbol

). If the

boolea

n

variable

powerOn

is

true

, then

!powerOn

is

false

and vice versa.

Use the assignment statement to change the state of

p

o

werOn

and then store it back into

p

owerOn

(remember assignment statements evaluate the right

hand side first, then assign the result to the left hand side variable.)

powerOn = !powerOn;

4.

Define two mutator methods to change the

volume

. One method should be called

increaseVolume

and

will increase the

volume

by 1. The other method should be called

decreaseVolume

and will decrease the

volume

by 1.

5.

Write Javadoc comments above each method header.

6.

Save this file, which will compile the code. Fix any syntax errors before proceeding.

7.

Do not run.

Task #

4

Running the Application

1.

You can only execute (run) a program that has a main method, so

the file that you

downloaded from D2L earlier in the instructions contains a starter version of the

demo/driver program that

you can use to

test out your

Television

class.

Complete a

File System Import of this

TelevisionDemo

.java

source code file into the

src

folder of the

LastNameFi

-

Lab0

6

Proj

project. (NOTE: The instructions regarding how to

import a

single/separate file into a projec

t

can be found in the

Getting Started With Eclipse

instruction

document found in the Course/Java Resources module in D2L.)

2.

At this point there should be no syntax errors. However, this demo/driver class and the

Television class must work in tandem, so i

f the class name or method names and

parameters do not match between the two files then syntax errors will occur

.

So if there

are any syntax errors, then fix these

errors before proceeding.

3.

Run the

TelevisionDemo

program and complete the input prompts as it runs.

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6

4.

If your output matches the output below. The

Television

.

java

class is complete and

correct. There will not be any further changes to the class file. However, if the following

output is not created, t

hen youll need to review the

Television.java

class file to

determine what needs to be changed to produce this output.

NOTE: Highlighted in yellow and bolded is user input

A 55 inch Toshiba has been turned on.

TV Settings

-

Channel: 2 Volume: 20

What channel do you want?

56

Volume too low! Increase the volume.

TV Settings

-

Channel: 56 Volume: 25

Too loud! Lowering the volume.

TV Settings

-

Channel: 56 Volume: 20

Task #

5

Creation another instance of a Television

1.

Edit the

TelevisionDemo.java

file.

2.

Instantiate another

Television

object whose reference variable is called

portable

Instantiate this object using the

Television

class fully parameterized constructor and

provide the following data to initialize the objects attribute fields: Shar

p is the

manufacturer, 19 inches is the size,

power is not on (i.e. false),

30 is the channel and 12 is

the volume level.

3.

Using

some of

the objects

accessor(

getter

) methods to

output the following statement that

includes the objects size and manufactur

er

The Television is a

19

inch made by

Sharp

4.

Use a call to the

power

method to turn the power on.

5.

Use calls to the accessor methods to print that the television was turned on and its current

channel and volume settings

T

he

19

inch

Sharp

has been turned on

TV Settings

-

Channel:

30

Volume:

12

6.

Use calls to the mutator(setter) methods to change the

channel

to the users preference

and decrease the

volume

by 2 levels

What channel do you want?

35

Please decrease the volume two levels

Note: channel

number is user input

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6

7.

Use calls to the accessor methods to print the changed state of the

portable

object.

TV Settings

-

Channel:

35

Volume:

10

8.

Save this file, which will compile the code. Fix any syntax errors before proceedin