PRG 421 Complete Class Week 1 to Week 5(2018)


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PRG 421 Complete Class Week 1 to Week 5(2018)

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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

 


 
 
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.

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.

Submit your TXT file to the Assignment Files tab.

 
 


 
 
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.

 
 

 


PRG 421 Week 3 Individual Assignment Analyzing a Program Containing Manipulating Data with the Java™ Stream API

 

Resource:

  • "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

 

// 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.

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 file named "Startercode.java".

Read through the code carefully and replace all occurrences of "___?___" with Java™ code.

Note: Refer to "Working with Dates and Times" in Ch. 5, "Dates, Strings, and Localization," in OCP: Oracle® Certified Professional Java® SE 8 Programmer II Study Guide for help.

Run and debug your JAVA file to ensure that your solution works.

Save your JAVA file with a .txt extension.

Submit your TXT file to the Assignment Files tab.

 

 

 
 
 
PRG 421 Week 4 Individual Assignment Analyzing a Program Containing Deadlock

 

Deadlock occurs when no processing can occur because two processes that are waiting for each other to finish. For example, imagine that two processes need access to a file or database table row in order to complete, but both processes are attempting to access that resource at the same time. Neither process can complete without the other releasing access to the required resource, so the result is deadlock. 

Read and analyze code in the linked document that spawns two different threads at the same time.

In a Microsoft® Word file, predict the results of executing the program, and identify whether a deadlock or starvation event will occur and, if so, at what point in the code.

Submit your Word file to the Assignment Files tab.

 

 


 
 
PRG 421 Week 5 Individual Assignment Coding a Program Containing JDBC

Resource:

  • "Starter Code to Access Tables via JDBC" text file

For this assignment, you will create Java™ code that accesses a relational database, requests data, and then analyzes and displays a portion of that data.

Imagine a MySQL relational database schema named COMPANY_DB containing two tables, employee_table and payroll_table, such that the records in each of the tables is as follows:

  • employee_table:

Emp id

FName  

LNname

Addr

City

State

Zip

100

Jack

Smith

123 North

Topeka

 KS

66603

101

Joe

Apple

4 Street

Denver

CO

80202

111

Nancy

Good

45 SW

Hartford

CT

06103

121

Tom

Whatever

89 NE

Dover

DE

19901

122

Jim

Thompson

789 W 95

Albany

NY

12207

123

Tommy

Boyson

154 Bolt

Boston

MA

02201

125

John

Jones

47 West

Lincoln

NE

68502

  • payroll_table:

Emp id

Paysch

401k

Spouse

100

BiWk

yes

yes

101

BiWk

yes

yes

111

Monthly

no

no

121

Wkly

pending

yes

122

Wkly

yes

no

123

Monthly

pending

no

125

Monthly

no

yes

 

The credentials you will need to access the database which holds both of the tables are as follows:

  • Host string = localhost:3306
  • Username = student
  • Password = prg421

Copy and paste the linked Java™ "starter" code into the NetBeans editor and save as a JAVA file.

Add Java™ statements to the file to accomplish the following:

  • Establish a connection to the database
  • Query the database, joining the two tables on the Emp_id field
  • Display your name and today's date on the console along with the following returned database results:
    • employee identification number
    • first and last name
    • state
    • payroll schedule
    • 401k plan
  • Close the database connection

Identify and correct any compile-time errors that exist in the starter code.

Note: Because you will not be connecting to an actual database, some compiler errors will remain.

After you finish, rename your JAVA file with a .txt extension using the following naming convention:

  • PRG421_Week5CodingAssignment_LastnameFirstname.txt.

Submit your TXT file to the Assignment Files tab.

 

 

 
 
 
 
PRG 421 Week 5 Individual Assignment Analyzing a Program Containing JDBC


Resource:

  • "Analyze and Document JDBC API Calls" text file

For this assignment, you will analyze code that uses the JDBC API to access a database, retrieve data, and compose output based on that data. You will then comment the code to reflect the purpose and expected results of the code.

Download the linked TXT file, and read through the Java™ code carefully.

Add your name, instructor's name, and today's date to the header comment.

Replace the five comment placeholders with succinct comments that explain and predict the results of the Java™ statement(s) that directly follow the comment placeholders.

Submit the updated TXT file containing your comments to the Assignment Files tab

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