PRG 420 Java Programming Course Assignments

PRG 420 All Assignments
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PRG 420 Week 1 Individual Analyzing a Simple Java™ Program (New
Syllabus)
PRG 420 Week 1 Coding a Simple “Hello, world!” Java™ Program
(New Syllabus)
PRG 420 Week 2 Analyzing a Program Containing if-then and switch
(New Syllabus)
PRG 420 Week 2 Coding a Program Containing if-then and switch (New
Syllabus)
PRG 420 Week 3 Analyzing a Program Containing Loops (New
Syllabus)
PRG 420 Week 3 Coding a Program Containing Loops (New Syllabus)
PRG 420 Week 4 Analyzing a Program Containing Arrays (New
Syllabus)
PRG 420 Week 4 Coding a Program Containing an Array (New
Syllabus)
PRG 420 Week 5 Analyzing a Program Containing Exception Handling
(New Syllabus)
PRG 420 Week 5 Coding a Program Containing Exception Handling
(New Syllabus)
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PRG 420 Week 1 Coding a Simple “Hello, world!”
Java™ Program(New Syllabus)
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Individual: Coding a Simple “Hello, world!” Java™ Program
Instructions:
Resource:
• PRG 420 Week One Coding Assigment Text File (starter code for this
assignment that includes placeholders)
For this assignment, you will apply what you learned in analyzing a
simple Java™ program by writing your own Java™ program. The
Java™ program you write should do the following:
• Display a prompt on the console asking the user to type in his or her
first name
• Construct the greeting string "Hello, nameEntered!"
• Display the constructed greeting on the console
Complete this assignment by doing the following:
1. Download the linked text file.
2. Add comments to the code by typing your name and the date in the

multi-line comment header.
3. Replace the following lines with Java™ code as directed in the file:
• LINE 1
• LINE 2
• LINE 3
• LINE 4
4. Comment each line of code you add to explain what you intend the
code to do.
5. Test and modify your Java™ program until it runs without errors and
produces the results as described above.
Note: Refer to this PRG 420 Week's analyzing code assignment if you
need help.
After you complete your assignment, zip your JAVA source (.java) file
and submit the ZIP file using the Assignment Files tab.
Supporting Material: PRG 420 Week One Coding Assignment Text File
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PRG 420 Week 1 DQ 1
www.prg420.com

Watch the first and second videos for Week 1. Explain a little about the
Java Virtual Machine, what it executes, how it might be similar to any
other language, and how it is different from a native language, such as
C++.
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PRG 420 Week 1 DQ 2
www.prg420.com
Java is a portable language, and being an object-oriented programming
language, it also encourages component reusability. How does Java
achieve these two important features? How are these features desirable
in modern software engineering?
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PRG 420 Week 1 DQ 3
www.prg420.com
You are a bank manager and you are helping a new bank teller
understand the kind of accounts the bank offers. If a customer comes in
asking to open a new savings account, the teller needs to ask what kind
of account--passbook savings or certificate of deposit--the customer
would like to open. Remind the customer that all accounts with our bank
are insured by the FDIC. You should explain that all accounts earn some
interest; a savings account’s interest is compounded monthly. You
should assign a unique account number after accepting the customer’s

initial deposit. If the customer chooses to receive statements
electronically, the system will send an e-mail with a monthly statement;
if the customer chooses not to, then a paper statement will be sent by
mail quarterly. If savings account is a class, give an example of each of
the following as it relates to that savings account. Explain your
reasoning behind your example. o Superclass o Subclass o Attribute o
Method o Instance (object) o Encapsulation
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PRG 420 Week 1 Individual Analyzing a Simple
Java™ Program (New Syllabus)
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Individual: Analyzing a Simple Java™ Program
Instructions:
Resource:
• PRG 420 Week One Analyze Assignment Text File
Analyzing Java™ code--that is, reading and predicting the outcome of
Java™ code, given one or more inputs--is an essential skill. The ability
to analyze code allows you to learn from example code and tutorials. It
also allows you to write and debug your own Java™ code.
For this assignment, you will be analyzing the Java™ code in the linked
text file.

Carefully read through the code line by line, then answer the following
questions in a Microsoft® Word document:
1. What syntax signals a Java™ comment? (In other words, what
symbol(s) tell the Java™ compiler not to process certain text?)
2. Type the line(s) of code that accept user input.
3. Type the line(s) of code that process user input.
4. Type the line(s) of code that produce output.
5. Type the result this program would produce if a user, when
prompted, responded by typing "everyone" and then hit Enter.
prompted, responded by typing in "Mickey Mouse" and hit Enter.
prompted, responded by typing "Benjamin Franklin" and hit Enter.
Submit your completed Word document using the Assignment Files tab.
Supporting Material: PRG 420 Week One Analyze Assignment Text
File
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PRG 420 Week 1 Individual Assignment Hello world
www.prg420.com

Create a program in Java™ that displays “Hello world!” Take a screen
shot that shows the program’s successful compilation and execution.
Then submit your program along with the screen shot.
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PRG 420 Week 2 Analyzing a Program Containing if-
then and switch(New Syllabus)
www.prg420.com
Individual: Analyzing a Program Containing if-then and switch
Instructions:
Resource:
• PRG 420 Week Two Analyze Assignment Text File
The ability to read through Java™ code and predict the results, given
specific inputs, is an extremely useful skill.
text file, and predicting the results given specific input.
1. What is the output of the program as it is written?
2. What would the output of the program be if you assigned I AmHappy

to false, num to 35, and numDayOf PRG 420 Week to 5?
3. What would the output of the program be if you assigned the
I AmHappy to 5, num to 50, and numDayOf PRG 420 Week to 8?
Supporting Material: PRG 420 Week Two Analyze Assignment Text
File
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PRG 420 Week 2 Coding a Program Containing if-
then and switch(New Syllabus)
www.prg420.com
Individual: Coding a Program Containing if-then and switch
Instructions:
Resources:
• PRG 420 Week Two Coding Assigment Text File (starter code for this
• PRG 420 Week Two Recommended Activity Text File (examples of
how to
code a switch statement, an if-then-else statement, and how to
construct a string to display text onscreen)

For this assignment, you will apply what you learned in analyzing
Java™ code so far in this course by writing your own Java™ program.
The Java™ program you write should do the following:
• Accept user input that represents the number of sides in a polygon.
Note: The code to do this is already written for you.
• If input value is not between 3 and 5, display an informative error
message
• If input value is between 3 and 5, use a switch statement to display a
message that identifies the correct polygon based on the number of
sides matching the input number (e.g., triangle, rectangle, or polygon)
1. Download the linked PRG 420 Week Two Coding Assigment Text
File.
2. Read the file carefully, especially the explanatory comments of what
the existing code does.
3. Add your name and the date in the multi-line comment header.
4. Refer to the following linked PRG 420 Week Two Recommended
Activity Text
File to see examples of how to code all of the Java™ statements (i.e.,
switch, println(), and if-then-else) you will need to write to complete this
Assignment.

5. Replace the following lines with Java code as directed in the file:
• LINE 1
• LINE 2
code to do.
need help.
Supporting Material: PRG 420 Week Two Coding Assignment Text File
PRG 420 Week Two
Recommended Activity Text File
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PRG 420 Week 2 DQ 1
www.prg420.com
Please watch the first three videos for Week 2 (around 40 minutes).
Explain how an outside class may be given access to find the value of a

private instance variable, or to change the value of a private instance
variable. Why does this add value to your program?
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PRG 420 Week 2 DQ 2
www.prg420.com
What are the three types of errors that you can encounter in a Java™
program? Describe them, and explain how you would minimize the
errors. What are some examples of errors that you have seen before?
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PRG 420 Week 2 DQ 3
www.prg420.com
A class is a blueprint for an object. A class may have a default
constructor, a constructor with arguments, accessor methods, mutator
methods, public fields, and private fields. Choose a category (such as
animal, vehicle, and so on) and describe how you would design a class
for it.
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PRG 420 Week 2 Individual Assignment Netbeans
Project (annual compensation)

www.prg420.com
Write a Java™ application using NetBeans™ Integrated Development
Environment (IDE) that calculates the total annual compensation of a
salesperson. Consider the following factors:
A salesperson will earn a fixed salary of $50,000
A salesperson will also receive a commission as a sales incentive.
Commission is a percentage of the salesperson’s annual sales. The
current commission is 5 % of total sales.
The total annual compensation is the fixed salary plus the commission
earned.
The Java™ application should meet these technical requirements:
The application should have at least one class, in addition to the
application’s controlling class (a controlling class is where the main
function resides).
There should be proper documentation in the source code.
The application should ask the user to enter annual sales, and it should
display the total annual compensation.
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PRG 420 Week 3 Analyzing a Program Containing
Loops(New Syllabus)

www.prg420.com
Individual: Analyzing a Program Containing Loops
Instructions:
Resource:
• PRG 420 Week Three Analyze Assignment Text File
PRG 420 Week Three Analyze Assignment Text File, and predicting the
results.
You will also examine both the code and the output for inconsistencies
And clarity. This Java™ code includes examples of for, while, and do
while
Loops.
1. What is the output of the program as it is written?
2. What improvement(s) could be made to this code to make the
output clearer or more accurate, or to make the code easier to
maintain?
Note: You do not have to make the improvements in the Java™
program, although you certainly may. For this assignment, simply

describe the things you see that would need to be improved to elevate
the code and output to a more professional level. For the code,
consider variable names and hardcoding. For the output, consider
formatting/punctuation, repetition, accuracy of information, and
wording.
Supporting Material: PRG 420 Week Three Analyze Assignment Text
File
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PRG 420 Week 3 Coding a Program Containing
Loops(New Syllabus)
www.prg420.com
Individual: Coding a Program Containing Loops
Instructions:
Resource:
• PRG 420 Week Three Coding Assignment Text File (starter code for
this
For this assignment, you will apply what you learned in analyzing for,
while, and do-while loops by writing these statements yourself. The

• Display a pyramid of asterisks onscreen (i.e., a nested for loop)
• Display the integers 10 to 1 in decreasing order, one number per line
(i.e., a while/do-whlie loop)
• Add 7 until the sum becomes greater than 157, at which point the
program should display both the sum and the number of 7s added
1. Download the linked PRG 420 Week Three Coding Assignment Text
File.
• LINE 1
• LINE 2
• LINE 3
code to do and why you chose each type of loop.
need help.

Supporting Material: PRG 420 Week Three Coding Assignment Text
File
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PRG 420 Week 3 DQ 1
www.prg420.com
Please watch the first and the fifth (next to the last) videos for Week 3
(feel free to use the transcripts, too!) . Tell me about the similarities
between the conditionals in if statements and the conditionals in while
statements.
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PRG 420 Week 3 DQ 2
www.prg420.com
Convert the following program from for loop to while loop. class
ArithmeticProgression { public static void main (String [] args) { int
sum = 0; for (int i = 1; i <= 1000; i++) { sum = sum + i;
System.out.println(Integer.toString(sum)); } } }
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PRG 420 Week 3 DQ 3
www.prg420.com
There are 3 kinds of loops—for loop, while loop, and do while loop.
Under which circumstances would each kind of loop be more
appropriate? Explain your answers using specific examples.
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PRG 420 Week 3 DQ 4
www.prg420.com
Consider the following conditions: CONDITION 1: while ( !(cChoice
== 'Q' || cChoice == 'q') ) CONDITION 2: while ( cChoice != 'Q' ||
cChoice != 'q' ) Do Conditions 1 and 2 give the same result? What tool
or technique would you use to explain the result?
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Project (annual compensation with commission)
www.prg420.com

Modify the Week Two Java™ application using Java™ NetBeans™
IDE to meet these additional and changed business requirements:
The company has recently changed its total annual compensation policy
to improve sales.
A salesperson will continue to earn a fixed salary of $50,000. The
current sales target for every salesperson is $120,000.
The sales incentive will only start when 80% of the sales target is met.
The current commission is 5% of total sales.
If a salesperson exceeds the sales target, the commission will increase
based on an acceleration factor. The acceleration factor is 1.5.
The application should ask the user to enter annual sales, and it should
display the total annual compensation.
The application should also display a table of potential total annual
compensation that the salesperson could have earned, in $5000
increments above the salesperson’s annual sales, until it reaches 50%
above the salesperson’s annual sales.
Sample Table: Assuming a total annual sales of $100,000, the table
would look like this:
Total Sales
Total Compensation
100,000
<>
105,000

<>
110,000
<>
115,000
<>
120,000
<>
125,000
<>
130,000
<>
135,000
<>
140,000
<>
145,000
<>
150,000
<>
The Java™ application should also meet these technical requirements:

application’s controlling class.
The source code must demonstrate the use of conditional and looping
structures.
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Arrays(New Syllabus)
www.prg420.com
Individual: Analyzing a Program Containing Arrays
Instructions:
Resource:
• PRG 420 Week Four Analyze Assignment Text File
The ability to read through Java™ code and predict the results, given
specific inputs, is an extremely useful skill.
PRG 420 Week Four Analyze Assignment Text File, and answering
questions
about the array that appears in the code.

1. If an array had not been chosen to hold the data manipulated in this
program, how else (i.e., with what other data types) could it have been
represented?
2. Which approach, using an array or using the alternative you
identified in question #1, is shorter/easier?
3. What is the output of this program?
4. What would be the result of using a println() statement to display the
value of arraynum[8]?
5. How many values can arraynum contain, and why?
Supporting Material: PRG 420 Week Four Analyze Assignment Text
File
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PRG 420 Week 4 Coding a Program Containing an
Array(New Syllabus)
www.prg420.com
Individual: Coding a Program Containing an Array
Instructions:

Resource:
• PRG 420 Week Four Coding Assigment Text File (starter code for this
simple Java™ program by writing your own Java™ program that
creates and accesses an array of integers. The Java™ program you
write should do the following:
• Create an array to hold 10 integers
• Ask the user for an integer. Note: This code has already been written
for you.
• Populate the array. Note: The first element should be the integer
input by the user. The second through tenth elements should each be
the previous element + 100. For example, if the user inputs 10, the first
array value should be 10, the second 110, the third 210, and so on.
• Display the contents of the array on the screen in ascending index
order.
1. Download the linked PRG 420 Week Four Coding Assigment Text
File.
2. Read each line of the file carefully, including the detailed instructions

at the top.
• LINE 1
• LINE 2
• LINE 3
• LINE 4
• LINE 5
code to do.
need help.
Supporting Material: PRG 420 Week Four Coding Assignment Text File
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PRG 420 Week 4 DQ 1

www.prg420.com
Assuming you want an array (named many) of seven ints what would be
the easiest way to write the code if you wanted many to contain all
zeros? What if you wanted many to contain a selection of seven values,
that were not all zeros? What would be the subscripts of all the elements
of many?
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PRG 420 Week 4 DQ 2
www.prg420.com
What is the difference between arrays and ArrayList? What are the
advantages and disadvantages of an ArrayList, and when should you use
an ArrayList over a simple array?
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PRG 420 Week 4 DQ 3
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What is the difference between string and StringBuilder? What are the
advantages and disadvantages of a StringBuilder, and when should you
use a StringBuilder over a simple String?

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Project (annual compensation comparison)
www.prg420.com
Modify the Week Three Java™ application using Java™ NetBeans™
IDE to meet these additional and changed business requirements:
The application will now compare the total annual compensation of at
least two salespersons.
It will calculate the additional amount of sales that each salesperson
must achieve to match or exceed the higher of the two earners.
The application should ask for the name of each salesperson being
compared.
The Java™ application should also meet these technical requirements:
application’s controlling class.
The source code must demonstrate the use of Array or ArrayList.
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Exception Handling(New Syllabus)

www.prg420.com
Individual: Analyzing a Program Containing Exception Handling
Instructions:
Resource:
• PRG 420 Week Five Analyze Assignment Text File
For this assignment, you will be analyzing the code in the linked PRG
420 Week
Five Analyze Assignment Text File. This program contains exception
handling code. You will be evaluating the code and using what you
learned in this PRG 420 Week's readings to predict the results based on
the
program as written, as well as based on changing the value of a
specific variable.
1. What are the results of the program as written?
2. What results would the program produce if you changed the value of
a from 0 to 3?

Supporting Material: PRG 420 Week Five Analyze Assignment Text
File
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PRG 420 Week 5 Coding a Program Containing
Exception Handling(New Syllabus)
www.prg420.com
Individual: Coding a Program Containing Exception Handling
Instructions:
Resource:
• PRG 420 Week Five Coding Assignment Text File (starter code for
this
simple Java™ program by writing your own Java™ program. The
• Organize the code capable of throwing an exception of type
ParseException as a try block.
• Include a catch block to handle a ParseException error thrown by the
try block.

• Include a hard-coded error that results in a ParseException to prove
that the code can catch and handle this type of exception.
1. Download the linked PRG 420 Week Five Coding Assignment Text
File.
• LINE 1
• LINE 2
4. Replace the value assigned with one of the variables so that the
program throws an exception.
code to do. Be sure to include a comment for the replacement value
you added in Step 4 that causes the program to throw an exception.
produces the results described above.
need help.
After you complete your assignment, zip your JAVA file and submit the
ZIP file using the Assignment Files tab.

SupportingMaterial: PRG 420 Week Five Coding Assignment Text File
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PRG 420 Week 5 DQ 1
www.prg420.com
Please explain one use for a static variable in a class. Please explain how
you might use one static method ( not main() ) in a class.
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PRG 420 Week 5 DQ 2
www.prg420.com
In your opinion, what are the three biggest challenges in planning and
designing a solution for a programming problem? What can you do to
overcome these challenges? How would you apply these techniques to
the programs in this class?
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PRG 420 Week 5 DQ 3
www.prg420.com

Using an example from your work or daily life, describe an "is-a"
relationship. Why is an "is-a" relationship important when designing an
inheritance between classes?
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PRG 420 Java Programming Course Assignments

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