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Project: PentagonalPyramid List2 Menu App Page 1 of 11
Page 1 of 11
Deliverables
Your project files should be submitted to Web-CAT by the due date and time specified. You may
submit your files to the skeleton code assignment until the project due date but should try to do this
much earlier. The skeleton code assignment is ungraded, but it checks that your classes and methods
are named correctly and that methods and parameters are correctly typed. The files you submit to
skeleton code assignment may be incomplete in the sense that method bodies have at least a return
statement if applicable or they may be essentially completed files. In order to avoid a late penalty for
the project, you must submit your completed code files to Web-CAT no later than 11:59 PM on the
due date for the completed code. If you are unable to submit via Web-CAT, you should e-mail your
files in a zip file to your TA before the deadline.
Files to submit to Web-CAT (all three files must be submitted together):
• PentagonalPyramid.java
• PentagonalPyramidList2.java
• PentagonalPyramidList2MenuApp.java
Specifications – Use arrays in this project; ArrayLists are not allowed!
Overview: The objective is to modify your Project 6 to use arrays instead of ArrayList objects. You
will write a program this week that is composed of three classes: the first class defines
PentagonalPyramid objects, the second class defines PentagonalPyramidList2 objects, and the third,
PentagonalPyramidList2MenuApp, presents a menu to the user with eight options and implements
these: (1) read input file (which creates an PentagonalPyramidList2 object), (2) print report, (3) print
summary, (4) add an PentagonalPyramid object to the PentagonalPyramidList2 object, (5) delete an
PentagonalPyramid object from the PentagonalPyramidList2 object, (6) find an PentagonalPyramid
object in the PentagonalPyramidList2 object, (7) Edit an PentagonalPyramid in the
PentagonalPyramidList2 object, and (8) quit the program. [You should create a new “Project 7”
folder and copy your Project 6 files (PentagonalPyramid.java, PentagonalPyramidList.java,
PentagonalPyramidListMenuApp.java, PentagonalPyramid_data_1.txt, and
PentagonalPyramid_data_0.txt) to it, rather than work in the same folder as Project 6 files.]
To rename an existing .java file, open the file in jGRASP, change the name of the class
and the name of the constructor (if it has one) in the source file, and then click the Save button.
In the dialog that pops up, click the “Rename and Save” button. This will rename and save the
.java file and delete the old associated .class file.
• PentagonalPyramid.java (assuming that you successfully created this class in Project 4, 5,
or 6, just copy the file to your new Project 7 folder and go on to
PentagonalPyramidList2.java on page 4. Otherwise, you will need to create
PentagonalPyramid.java as part of this project.)
Requirements: Create a PentagonalPyramid class that stores the label, base edge (i.e., length of
an edge in the pentagonal base), and height. The base edge and height must be greater than zero.
The PentagonalPyramid class also includes methods to set and get each of these fields, as well as
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methods to calculate the surface area and volume of a PentagonalPyramid object, and a method to
provide a String value of a PentagonalPyramid object (i.e., a class instance).
A PentagonalPyramid has a pentagon base and five isosceles triangle faces, six vertices, and 10 edges as
depicted below with base edge length a and height h. The formulas are provided to assist you in computing
return values for the respective methods in the PentagonalPyramid class described in this project.
Ref: Do a “Google” search on “pentagonal pyramid surface area” for details and an interactive solver.
Surface Area
(A)
Volume (V)
Edge length
(a)
Height (h)
Design: The PentagonalPyramid class has fields, a constructor, and methods as outlined below.
(1) Fields (instance variables): label of type String, base edge of type double, and height of type
double. Initialize the String to “” and the double to 0 in their respective declarations. These
instance variables should be private so that they are not directly accessible from outside of the
PentagonalPyramid class, and these should be the only instance variables in the class.
(2) Constructor: Your PentagonalPyramid class must contain a public constructor that accepts
three parameters (see types of above) representing the label, base edge, height. Instead of
assigning the parameters directly to the fields, the respective set method for each field
(described below) should be called. For example, instead of the statement label =
labelIn; use the statement setLabel(labelIn); Below are examples of how the
constructor could be used to create PentagonalPyramid objects. Note that although String
and numeric literals are used for the actual parameters (or arguments) in these examples,
variables of the required type could have been used instead of the literals.
PentagonalPyramid ex1 = new PentagonalPyramid(“Ex 1″, 1, 2);
PentagonalPyramid ex2 = new PentagonalPyramid(” Ex 2 “, 12.3, 25.5);
PentagonalPyramid ex3 = new PentagonalPyramid(“Ex 3”, 123.4, 900);
(3) Methods: Usually a class provides methods to access and modify each of its instance
variables (known as get and set methods) along with any other required methods. The
methods for PentagonalPyramid, which should each be public, are described below. See
formulas in Code and Test below.
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o getLabel: Accepts no parameters and returns a String representing the label field.
o setLabel: Takes a String parameter and returns a boolean. If the string parameter is
not null, then the label field is set to the “trimmed” String and the method returns true.
Otherwise, the method returns false and the label field is not set.
o getBaseEdge: Accepts no parameters and returns a double representing the base edge
field.
o setBaseEdge: Accepts a double parameter and returns a boolean as follows. If the
double is greater than zero, sets the base edge field to the double passed in and returns
true. Otherwise, the method returns false and does not set the base edge field.
o getHeight: Accepts no parameters and returns a double representing the height field.
o setHeight: Accepts a double parameter and returns a boolean as follows. If the
double is greater than zero, sets the height field to the double passed in and returns true.
Otherwise, the method returns false and does not set the height field.
o surfaceArea: Accepts no parameters and returns the double value for the total
surface area calculated using formula above and the values of the base edge and height
fields. See code and test below regarding the Math.tan(x) method.
o volume: Accepts no parameters and returns the double value for the volume calculated
using formula above and the values of the base edge and height fields.
o toString: Returns a String containing the information about the PentagonalPyramid
object formatted as shown below, including decimal formatting (“#,##0.0######”)
for the double values. Newline and tab escape sequences should be used to achieve the
proper layout. In addition to the field values (or corresponding “get” methods), the
following methods should be used to compute appropriate values in the toString
method: surfaceArea() and volume(). Each line should have no trailing spaces
(e.g., there should be no spaces before a newline (\n) character). The toString value
for ex1, ex2, and ex3 respectively are shown below (the blank lines are not part of the
toString values).
PentagonalPyramid “Ex 1” with base edge = 1.0 and height = 2.0 units has:
surface area = 7.008203 square units
volume = 1.1469849 cubic units
PentagonalPyramid “Ex 2” with base edge = 12.3 and height = 25.5 units has:
surface area = 1,086.4892066 square units
volume = 2,212.4737204 cubic units
PentagonalPyramid “Ex 3” with base edge = 123.4 and height = 900.0 units has:
surface area = 305,081.9691528 square units
volume = 7,859,601.8538338 cubic units
Code and Test: Math.tan(x) expects x to be in radians rather than degrees. In the formula, 54
degrees can be converted to radians using Math.toRadians(54). The following combines the two
methods: Math.tan(Math.toRadians(54))
As you implement your PentagonalPyramid class, you should compile it and then test it using
interactions. For example, as soon you have implemented and successfully compiled the
constructor, you should create instances of PentagonalPyramid in interactions (e.g., copy/paste
the examples above). Remember that when you have an instance on the workbench, you can
unfold it to see its values. You can also open a viewer canvas window and drag the instance from
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the Workbench tab to the canvas window. After you have implemented and compiled one or
more methods, create a PentagonalPyramid object in interactions and invoke each of your
methods on the object to make sure the methods are working as intended. You may find it useful
to create a separate class with a main method that creates an instance of PentagonalPyramid then
prints it out. This would be similar to the PentagonalPyramidApp class you created in a previous
project, except that in the PentagonalPyramidApp class you read in the values and then created
and printed the object.
• PentagonalPyramidList2.java – You must use arrays instead of ArrayList objects.
(Assuming that you successfully created this class in Project 6, just copy
PentagonalPyramidList.java to your new Project 7 folder and then open in jGRASP and
rename as PentagonalPyramidList2. To rename an existing .java file, open the file in
jGRASP, change the name of the class and the name of the constructor in the source code,
and then click the Save button. In the dialog that pops up, click the “Rename and Save”
button. This will rename and save the .java file and then delete old associated .class file.
Otherwise, you will need to create all of PentagonalPyramidList2.java as part of this
project.) In the requirements below, PentagonalPyramidList has been changed to
PentagonalPyramidList2. Be sure to make these changes in your methods as necessary.
Requirements: Create a PentagonalPyramidList2 class that stores the name of the list and an
array of PentagonalPyramid objects, and the number of PentagonalPyramid objects in the array.
It also includes methods that return the name of the list, number of PentagonalPyramid objects in
the PentagonalPyramidList2, total surface area, total volume, average surface area, and average
volume for all PentagonalPyramid objects in the PentagonalPyramidList2. The toString method
returns a String containing the name of the list followed by each PentagonalPyramid in the array,
and a summaryInfo method returns summary information about the list (see below).
Design: The PentagonalPyramidList2 class has three fields, a constructor, and methods as
outlined below.
(1) Fields (or instance variables): (1) a String representing the name of the list, (2) an array of
PentagonalPyramid objects, and (3) an int representing the number of PentagonalPyramid
objects in the PentagonalPyramid array. These are the only fields (or instance variables) that
this class should have.
(2) Constructor: Your PentagonalPyramidList2 class must contain a constructor that accepts a
parameter of type String representing the name of the list, a parameter of type
PentagonalPyramid[], representing the list of PentagonalPyramid objects, and a
parameter of type int representing the number of PentagonalPyramid objects in the
PentagonalPyramid array. These parameters should be used to assign the fields described
above (i.e., the instance variables).
(3) Methods: Methods: The methods for PentagonalPyramidList are described below.
o getName: Returns a String representing the name of the list.
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o numberOfPentagonalPyramids: Returns an int representing the number of
PentagonalPyramid objects in the PentagonalPyramidList. If there are zero
PentagonalPyramid objects in the list, zero should be returned.
o totalSurfaceArea: Returns a double representing the total surface areas for all
PentagonalPyramid objects in the list. If there are zero PentagonalPyramid objects in the
list, zero should be returned.
o totalVolume: Returns a double representing the total volumes for all
PentagonalPyramid objects in the list. If there are zero PentagonalPyramid objects in the
list, zero should be returned.
o averageSurfaceArea: Returns a double representing the average surface area for
all PentagonalPyramid objects in the list. If there are zero PentagonalPyramid objects in
the list, zero should be returned.
o averageVolume: Returns a double representing the average volume for all
PentagonalPyramid objects in the list. If there are zero PentagonalPyramid objects in the
list, zero should be returned.
o toString: Returns a String (does not begin with \n) containing the name of the list
followed by each PentagonalPyramid in the array. In the process of creating the return
result, this toString() method should include a while loop that calls the toString() method
for each PentagonalPyramid object in the list (adding a \n before and after each). Be sure
to include appropriate newline escape sequences. For an example, see lines 2 through 16
in the output from PentagonalPyramidListApp for the PentagonalPyramid_data_1.txt
input file. [Note that the toString result should not include the summary items in lines 18
through 24 of the example. These lines represent the return value of the summaryInfo
method.]
o summaryInfo: Returns a String (does not begin with \n) containing the name of the
list (which can change depending of the value read from the file) followed by various
summary items: number of PentagonalPyramid objects, total surface area, total volume,
average surface area, and average volume. Use “#,##0.0##” as the pattern to format the
double values. For an example, see lines 18 through 24 in the output from
PentagonalPyramidList2App for the PentagonalPyramid_data_1.txt input file. The
second example shows the output from PentagonalPyramidList2App for the
PentagonalPyramid_data_0.txt input file which contains a list name but no
PentagonalPyramid data.
o getList: Returns the array of PentagonalPyramid objects (the second field above).
o readFile: Takes a String parameter representing the file name, reads in the file,
storing the list name and creating an array of PentagonalPyramid objects, uses the list
name, the array, and number of PentagonalPyramid objects in the array to create a
PentagonalPyramidList2 object, and then returns the PentagonalPyramidList2 object.
See note #1 under Important Considerations for the PentagonalPyramidList2MenuApp
class (last page) to see how this method should be called.
o addPentagonalPyramid: Returns nothing but takes three parameters (label, base
edge, and height), creates a new PentagonalPyramid object, and adds it to the
PentagonalPyramidList2 object. Finally, the number of elements field must be
incremented.
o findPentagonalPyramid: Takes a label of a PentagonalPyramid as the String
parameter and returns the corresponding PentagonalPyramid object if found in the
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PentagonalPyramidList2 object; otherwise returns null. Case should be ignored when
attempting to match the label.
o deletePentagonalPyramid: Takes a String as a parameter that represents the
label of the PentagonalPyramid and returns the PentagonalPyramid if it is found in the
PentagonalPyramidList2 object and deleted; otherwise returns null. Case should be
ignored when attempting to match the label; consider calling/using
findPentagonalPyramid in this method. When an element is deleted from an
array, elements to the right of the deleted element must be shifted to the left. After
shifting the items to the left, the last PentagonalPyramid element in the array should be
set to null. Finally, the number of elements field must be decremented.
o editPentagonalPyramid: Takes three parameters (label, base edge, and height), uses the
label to find the corresponding the PentagonalPyramid object. If found, sets the base
edge and height to the values passed in as parameters, and returns true. If not found,
returns false. This method should not change the label.
Code and Test: Remember to import java.util.Scanner, java.io.File,
java.io.FileNotFoundException. These classes will be needed in the readFile method which will
require a throws clause for FileNotFoundException. Some of the methods above require that you
use a loop to go through the objects in the array. You may want to implement the class below in
parallel with this one to facilitate testing. That is, after implementing one to the methods above,
you can implement the corresponding “case” in the switch for menu described below in the
PentagonalPyramidList2MenuApp class.
• PentagonalPyramidList2MenuApp.java (replaces PentagonalPyramidListMenuApp class
from Project 6; the file and class name in the file must be renamed to reflect
PentagonalPyramidList2MenuApp). To rename an existing .java file, open the file in
jGRASP, change the name of the class in the source code, and then click the Save button.
In the dialog that pops up, click the “Rename and Save” button. This will rename the .java
file, save it, and delete the old associated .class file. Be sure to make these changes in your
main method as necessary.
Requirements: Create a PentagonalPyramidList2MenuApp class with a main method that
presents the user with a menu with eight options, each of which is implemented to do the
following: (1) read the input file and create a PentagonalPyramidList2 object, (2) print the
PentagonalPyramidList2 object, (3) print the summary for the PentagonalPyramidList2 object, (4)
add a PentagonalPyramid object to the PentagonalPyramidList2 object, (5) delete a
PentagonalPyramid object from the PentagonalPyramidList2 object, (6) find a
PentagonalPyramid object in the PentagonalPyramidList2 object, (7) edit a PentagonalPyramid
object in the PentagonalPyramidList2 object, and (8) quit the program.
Design: The main method should print a list of options with the action code and a short
description followed by a line with just the action codes prompting the user to select an action.
After the user enters an action code, the action is performed, including output if any. Then the
line with just the action codes prompting the user to select an action is printed again to accept the
next code. The first action a user would normally perform is ‘R’ to read in the file and create a
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PentagonalPyramidList2 object. However, the other action codes should work even if an input
file has not been processed. The user may continue to perform actions until ‘Q’ is entered to quit
(or end) the program. Note that your program should accept both uppercase and lowercase action
codes. Below is output produced after printing the action codes with short descriptions, followed
by the prompt with the action codes waiting for the user to make a selection.
Line # Program output
1
2
3
4
5
6
7
8
9
10
PentagonalPyramid List System Menu
R – Read File and Create PentagonalPyramid List
P – Print PentagonalPyramid List
S – Print Summary
A – Add PentagonalPyramid
D – Delete PentagonalPyramid
F – Find PentagonalPyramid
E – Edit PentagonalPyramid
Q – Quit
Enter Code [R, P, S, A, D, F, E, or Q]:
Below shows the screen after the user entered ‘r’ and then (when prompted) the file name. Notice
the output from this action was “File read in and PentagonalPyramid List created”. This is
followed by the prompt with the action codes waiting for the user to make the next selection.
You should use the PentagonalPyramid_data_1.txt file from Project 5 to test your program.
Line # Program output
1
2
3
4
5
Enter Code [R, P, S, A, D, F, E, or Q]: r
File Name: PentagonalPyramid_data_1.txt
File read in and PentagonalPyramid List created
Enter Code [R, P, S, A, D, F, E, or Q]:
The result of the user selecting ‘p’ to Print PentagonalPyramid List is shown below and next
page.
Line # Program output
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Enter Code [R, P, S, A, D, F, E, or Q]: p
PentagonalPyramid Test List
PentagonalPyramid “Ex1” with base edge = 1.0 and height = 2.0 units has:
surface area = 7.008203 square units
volume = 1.1469849 cubic units
PentagonalPyramid “Ex 2” with base edge = 12.3 and height = 25.5 units has:
surface area = 1,086.4892066 square units
volume = 2,212.4737204 cubic units
PentagonalPyramid “Ex 3” with base edge = 123.4 and height = 900.0 units has:
surface area = 305,081.9691528 square units
volume = 7,859,601.8538338 cubic units
Enter Code [R, P, S, A, D, F, E, or Q]:
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The result of the user selecting ‘s’ to print the summary for the list is shown below.
Line # Program output
1
2
3
4
5
6
7
8
9
10
Enter Code [R, P, S, A, D, F, E, or Q]: s
—– Summary for PentagonalPyramid Test List —–
Number of PentagonalPyramid: 3
Total Surface Area: 306,175.467
Total Volume: 7,861,815.475
Average Surface Area: 102,058.489
Average Volume: 2,620,605.158
Enter Code [R, P, S, A, D, F, E, or Q]:
The result of the user selecting ‘a’ to add a PentagonalPyramid object is shown below. Note that
after ‘a’ was entered, the user was prompted for label, base edge, and height. Then after the
PentagonalPyramid object is added to the PentagonalPyramid List, the message “***
PentagonalPyramid added ***” was printed. This is followed by the prompt for the next action.
After you do an “add”, you should do a “print” or a “find” to confirm that the “add” was
successful.
Line # Program output
1
2
3
4
5
6
7
Enter Code [R, P, S, A, D, F, E, or Q]: a
Label: Ex 4
Base Edge: 10.5
Height: 1000
*** PentagonalPyramid added ***
Enter Code [R, P, S, A, D, F, E, or Q]:
Here is an example of the successful “delete” for a PentagonalPyramid object, followed by an
attempt that was not successful (i.e., the PentagonalPyramid object was not found). You should
do “p” to confirm the “d”.
Line # Program output
1
2
3
4
5
6
7
8
9
Enter Code [R, P, S, A, D, F, E, or Q]: d
Label: ex 2
“Ex 2” deleted
Enter Code [R, P, S, A, D, F, E, or Q]: d
Label: Fake
“Fake” not found
Enter Code [R, P, S, A, D, F, E, or Q]:
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Here is an example of the successful “find” for a PentagonalPyramid object, followed by an
attempt that was not successful (i.e., the PentagonalPyramid object was not found).
Line # Program output
1
2
3
4
5
6
7
8
9
10
11
Enter Code [R, P, S, A, D, F, E, or Q]: f
Label: ex 3
PentagonalPyramid “Ex 3” with base edge = 123.4 and height = 900.0 units has:
surface area = 305,081.9691528 square units
volume = 7,859,601.8538338 cubic units
Enter Code [R, P, S, A, D, F, E, or Q]: f
Label: Another Fake
“Another Fake” not found
Enter Code [R, P, S, A, D, F, E, or Q]:
Here is an example of the successful “edit” for a PentagonalPyramid object, followed by an
attempt that was not successful (i.e., the PentagonalPyramid object was not found). In order to
verify the edit, you should do a “find” for “medium” or you could do a “print” to print the whole
list.
Line # Program output
1
2
3
4
5
6
7
8
9
10
11
12
13
Enter Code [R, P, S, A, D, F, E, or Q]: e
Label: Ex 3
Base Edge: 250
Height: 1000
“Ex 3” successfully edited
Enter Code [R, P, S, A, D, F, E, or Q]: e
Label: Ex 33
Base Edge: 1.5
Height: 4.5
“Ex 33” not found
Enter Code [R, P, S, A, D, F, E, or Q]:
Finally, below is an example of entering an invalid code, followed by an example of entering a
‘q’ to quit the application with no message.
Line # Program output
1
2
3
4
5
Enter Code [R, P, S, A, D, F, E, or Q]: k
*** invalid code ***
Enter Code [R, P, S, A, D, F, E, or Q]: q
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Code and Test:
Important considerations: This class should import java.util.Scanner and
java.io.FileNotFoundException. Carefully consider the following information as you develop
this class.
1. At the beginning of your main method, you should declare and create an array of
PentagonalPyramid objects and then declare and create a PentagonalPyramidList2 object
using the list name, the array, and 0 as the parameters in the constructor. This will be an
PentagonalPyramidList2 object that contains no PentagonalPyramid objects. For example:
String _______ = “*** no list name assigned ***”;
PentagonalPyramid[] _________ = new PentagonalPyramid[100];
PentagonalPyramidList2 _________ = new
PentagonalPyramidList2(_________,_________,_________);
The ‘R’ option in the menu should invoke the readFile method on your
PentagonalPyramidList2 object. This will return a new PentagonalPyramidList2 object based
on the data read from the file, and this new PentagonalPyramidList2 object should replace (be
assigned to) your original PentagonalPyramidList2 object variable in main. Since the
readFile method throws FileNotFoundException, your main method needs to do this as well.
2. Very Important: You should declare only one Scanner on System.in for your entire
program, and this should be done in the main method. That is, all input from the
keyboard (System.in) must be done in your main method. Declaring more than one Scanner
on System.in in your program will likely result in a very low score from Web-CAT.
3. For the menu, your switch statement expression should evaluate to a char and each case
should be a char; alternatively, your switch statement expression should evaluate to a String
with a length of 1 and each case should be a String with a length of 1.
After printing the menu of actions with descriptions, you should have a do-while loop that prints
the prompt with just the action codes followed by a switch statement that performs the indicated
action. The do-while loop ends when the user enters ‘q’ to quit. You should strongly consider
using a for-each loop as appropriate in the new methods that require you to search the list. You
should be able to test your program by exercising each of the action codes. After you implement
the “Print PentagonalPyramid List” option, you should be able to print the
PentagonalPyramidList2 object after operations such as ‘A’ and ‘D’ to see if they worked. You
may also want to run in debug mode with a breakpoint set at the switch statement so that you can
step-into your methods if something is not working. In conjunction with running the debugger,
you should also create a canvas drag the items of interest (e.g., the Scanner on the file, your
PentagonalPyramidList2 object, etc.) onto the canvas and save it. As you play or step through
your program, you’ll be able to see the state of these objects change when the ‘R’, ‘A’, and ‘D’
options are selected.
a. For option P, when you print the PentagonalPyramidList2 object (e.g., myList) be
sure to append a leading “\n” in println:
System.out.println(“\n” + myList);
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b. For option S, when you print the summary for PentagonalPyramidList2 object (e.g.,
cList) be sure to append a leading and trailing “\n” in the .println:
System.out.println(“\n” + myList.summaryInfo() + “\n”);
Although your program may not use all of the methods in your PentagonalPyramid and
PentagonalPyramidList2 classes, you should ensure that all of your methods work according to
the specification. You can run your program in the canvas and then after the file has been read in,
you can call methods on the PentagonalPyramidList2 object in interactions or you can write
another class and main method to exercise the methods. Web-CAT will test all methods to
determine your project grade.

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