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PRG 421 ENTIRE CLASS
PRG 421 Week 1 Individual Assignment Analyzing a Program Containing Abstract
and Derived Classes
Resource:
 "Analyzing a Java™ Program Contaiing Abstract and Derived Classes"
The purpose of creating an abstract class is to model an abstract situation.
Example:
You work for a company that has different types of customers: domestic, international,
business partners, individuals, and so on. It well may be useful for you to "abstract out"
all the information that is common to all of your customers, such as name, customer
number, order history, etc., but also keep track of the information that is specific to
different classes of customer. For example, you may want to keep track of additional
information for international customers so that you can handle exchange rates and
customs-related activities, or you may want to keep track of additional tax-, company-,
and department-related information for business customers.
Modeling all these customers as one abstract class ("Customer") from which many
specialized customer classes derive or inherit ("International Customer," "Business
Customer," etc.) will allow you to define all of that information your customers have in
common and put it in the "Customer" class, and when you derive your specialized
customer classes from the abstract Customer class you will be able to reuse all of those
abstract data/methods.This approach reduces the coding you have to do which, in turn,
reduces the probability of errors you will make. It also allows you, as a programmer, to
reduce the cost of producing and maintaining the program.
In this assignment, you will analyze Java™ code that declares one abstract class and
derives three concrete classes from that one abstract class. You will read through the
code and predict the output of the program.
Read through the linked Java™ code carefully.
Predict the result of running the Java™ code. Writeyour prediction into a
Microsoft® Word document, focusing specifically on what text you think will appear on
the console after running the Java™ code.
In the same Word document, answer the following question:
 Why would a programmer choose to define a method in an abstract class, such as
the Animal constructor method or the getName() method in the linked code example, as
opposed to defining a method as abstract, such as the makeSound() method in the
linked example?
Supporting Material: Week One Analyze Assignment Text File

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PRG 421 Week 1 Individual Assignment Coding a Program Containing Abstract
and Derived Classes
Resources:
 "Lesson: Object-Oriented Programming Concepts" on The Java™ Tutorials website
 Downloadable starter code from the Oracle® website: Bicyle class and BicycleDemo
class
For this assignment, you will modify existing code to create a single Java™ program
named BicycleDemo.java that incorporates the following:
 An abstract Bicycle class that contains private data relevant to all types of bicycles
(cadence, speed, and gear) in addition to one new static variable: bicycleCount. The
private data must be made visible via public getter and setter methods; the static
variable must be set/manipulated in the Bicycle constructor and made visible via a public
getter method.
 Two concrete classes named MountainBike and RoadBike, both of which derive from the
abstract Bicycle class and both of which add their own class-specific data and
getter/setter methods.
Read through the "Lesson: Object-Oriented Programming Concepts" on The Java™
Tutorials website.
Download the linked Bicycle class, or cut-and-paste it at the top of a new Java™ project
named BicycleDemo.
Download the linked BicycleDemo class, or cut-and-paste it beneath the Bicycle class in
the BicycleDemo.java file.
Optionally, review this week's Individual "Week One Analyze Assignment," to refresh
your understanding of how to code derived classes.

3. Adapt the Bicycle class by cutting and pasting the class into the NetBeans editor and
completing the following:
 Change the Bicycle class to be an abstract class.
 Add a private variable of type integer named bicycleCount, and initialize this variable to
0.
 Change the Bicycle constructor to add 1 to the bicycleCount each time a new object of
type Bicycle is created.
 Add a public getter method to return the current value of bicycleCount.
 Derive two classes from Bicycle: MountainBike and RoadBike. To the MountainBike
class, add the private variables tireTread (String) and mountainRating (int). To the
RoadBike class, add the private variable maximumMPH (int).
Using the NetBeans editor, adapt the BicycleDemo class as follows:
 Create two instances each of MountainBike and RoadBike.
 Display the value of bicycleCount on the console.
Comment each line of code you add to explain what you added and why. Be sure to
include a header comment that includes the name of the program, your name, PRG/421,
and the date.
Rename your JAVA file to have a .txt file extension.
Submit your TXT file to the Assignment Files tab.
PRG 421 Week 2 Individual Assignment Coding a Program Containing Console/file
input and output
Resource:
 "Console/File Input and Output" text file
For this assignment, you will build on "starter" code to create a Java™ program that
prompts the user for input, accepts user input, and produces both console and file
output.
Copy the linked code to a JAVA file.
Add Java® code based on the comments inside the code.
Note: Refer to this week's Individual "Week Two Analyze Assignment" for model code
you can adapt to meet this assignment's requirements.
Test, debug, and run your code using the NetBeans editor to make sure it meets the
program requirements.
Save your JAVA file with a .txt extension.

4. Submit your TXT file to the Assignment Files tab.
PRG 421 ENTIRE CLASS
PRG 421 Week 2 Individual Assignment Analyzing a Program Containing
Console/file input and output
Resource:
 "Demonstrate the Coding to Produce Output to a File" text file
For this assignment, you will analyze Java™ that presents instructional text on the
console, accepts user input, and then creates a file based on that user input.
Read the linked Java™ code carefully.
Then, answer the following questions in a Microsoft® Word file:
 As you run the program in NetBeans the first time, at the prompt (the program will pause
for input) type abc Return def Return ghi Ctrl+Shift+Del. What is the result?
 As you run the program in NetBeans the second time, at the prompt (the program will
pause for input) type 123 Ctrl+Shift +Del. What is the result?
 What happens if the file Data.txt already exists when you run the program?
 What happens if the file Data.txt does not already exist when you run the program?
Submit your Word file to the Assignment Files tab.
Prg421.com
PRG 421 Week 3 Individual Assignment Analyzing a
Program Containing Manipulating Data with the Java™ Stream API
Resource:

5.  "Java Code That Sorts, Extracts Data and Saves It To a Collection" text file
For this assignment, you will analyze code that uses a file input stream and a file output
stream.
Read through the linked Java™ code.
In a Microsoft® Word document, answer the following questions:
 Could this program be run as is? If not, what is it lacking?
 Does this program modify the contents of an input stream? In what way?
 What are the results of running this code?
Submit your completed Word document to the Assignment Files tab.
PRG 421 Week 3 Individual Assignment Coding a Program Containing
Manipulating Data with the Java™ Stream API
For this assignment, you will develop "starter" code. After you finish, your code should
access an existing text file that you have created, create an input stream, read the
contents of the text flie, sort and store the contents of the text file into an ArrayList, then
write the sorted contents via an ouput stream to a separate output text file.
Copy and paste the following Java™ code into a JAVA source file in NetBeans:
import java.io.BufferedReader;
import java.io.BufferedWriter;
public class Datasort {
public static void main (String [] args) {
File fin = // input file
File fout = // create an out file

6. // Java FileInputStream class obtains input bytes from a file
FileInputStream fis = new FileInputStream(fin);
// buffering characters so as to provide for the efficient reading of characters, arrays, and
lines
BufferedReader in = new BufferedReader(new InputStreamReader(fis));
// declare an array in-line, ready for the sort
String aLine;
ArrayList<String> al = new ArrayList<String> ();
int i = 0;
while ((aLine = in.readLine()) != null) {
// set the sort for values is greater than 0
Collections.sort(al); // sorted content to the output file
{
System.out.println(s);
}
// close the 2 files
}
}
Add code as indicated in the comments.
Note: Refer to this week's Individual assignment, "Week Three Analyze Assignment,"
and to Ch. 8, "IO," in OCP: Oracle® Certified Professional Java® SE 8 Programmer II
Study Guide.
Run and debug your modified program in NetBeans until it satisfies the requirements
described above.

7. Save your finalized JAVA file with a .txt extension.
Submit your TXT file to the Assignment Files tab.
PRG 421 Week 4 Individual Assignment Coding a Program Containing Locale
Object
Resource:
 "The Locale Object" text file
For this assignment, you will develop Java™ code that relies on localization to format
currencies and dates.
In NetBeans, copy the linked code to a
PRG 421 ENTIRE CLASS
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