1. Description: Unit 9 - Java Arrays and Data Files
This unit is really about three different topics that are related to
one another – arrays in Java, simple text files in Java, and
modular programing in java (Java methods).
The unit has a programming project spread over three related
programming assignments, each worth 10 points.
In the first assignment, you will create a Java program that
works with a small array of data containing five test scores. It
will get data from user input do some calculations, and then
print the results.
In the second assignment, you will modify a copy of the first
assignment to load the data from a data file into an array, and
then output the results to a data file.
In the third assignment, you will decompose a copy of the
second assignment into separate methods in Java.
Our goal is to have a good modular program that loads stored
data from a fie into an array, works with the data, then sends
results to another data file. Doing this in three parts will allow
you to focus on one aspect of the problem at a time.
There are reading assignments in Zybooks, but
the two chapters from the Java Learning Kit – Chapter 5 – and
Chapter 6 are your best source for learning this material. They
cover the things you need to learn to complete this project and
have good sample programs.
Your tasks are to:

2. Read Zybooks Assginment 11 - Arrays in Java.
Read the material in JLK Chapter 6 about arrays in Java.
Complete the Java Arrays Programming assignment.
Read the material in Chapter 6 about text files in Java.
There is no corresponding Zybooks assignment.
Complete the Java Text Files Programming assignment.
Read the Zybooks Assignment 12 - Methods in Java
Read the material in JLK Chapter 5 about methods in Java.
Complete the Java Methods programming assignment.
It may seem like their is a lot to do here but the assignments are
each simple and build on one another.
assignments:
#1
You should complete
Zybooks Assignment 11 - Arrays in Java
and read lessons
6.1, 6.2, and 6.3 in JLK Chapter 6

3. about arrays in Java before starting this assignment.
Your task is to create a Java I-P-O program that works with a
small array of data containing five test scores.
Your program should:
contain a for loop to read five test score into an array from the
user. The array should be a floating point array with five
elements.
Using second for loop, calculate the average score, highest
score, and lowest score in the array. JLK lesson 6.3 is a good
guide for doing this.
print the results.
You should submit a zipped copy of your IntelliJ project folder.
#2
You should read lesson
6.5 Text File Input and Output in Java
before starting this assignment. Reading Lab 6.6 will also be
helpful. There is no corresponding Zybooks assignment.
Your task is to modify the program from the
Java Arrays
programming assignment to use text files for input and output.
I suggest you save acopy of the original before modifying the
software.

4. Your modified program should:
contain a for loop to read the five test score into the array from
a text data file.
You will need to create and save a data file for the program to
use. It should have one test score on each line of the file. You
can type and save the text file with any text editor, such as
Notepad or Notepad++. NotePad++ is a good program to have
on your computer, It can be downloaded freely from:
https://notepad-plus-plus.org
(Links to an external site.)
It should be saved or copied to the same folder as your Java
source code file within you Intellij project.
Contain a second for loop, calculate the average score, highest
score, and lowest score in the array. This part of your program
does not need to change from the previous assignment.
output the results to a new text file. You can decide the name of
the file. You should only use a local file name and the file will
then be created in your IntelliJ project folder.
You should submit a zipped copy of your IntelliJ project folder,
which should contain the two data files within the project..
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5. #3
You should complete
Zybooks Assignment 12 - Methods in Java
and read lessons
JLK Chapter 5 - Methods and Modularity in Java
before starting this assignment.
Your task is to modify the program from the
Java
Text files programming assignment to contain several methods
for different parts of the program.I suggest you save a copy of
the original before modifying the software.
Your modified program should have the following six methods:
a method with a for loop to read the five test score into the
array from a text data file. The array should be declared in the
main method and passed as a parameter to this method.
three separate methods to each calculate and return one of the
following: the average score, highest score, and lowest score .
Each method should contain a for loop to calculate and return
one of the values to the main method. You can copy and edit he
existing loop form the previous program for each of these
methods.

6. a method to output the results to a new text file, as the main
method did in the previous program. You basically need to
move the code to do this into a new method.
the main method, which has the necessary variables and which
calls the other methods as needed, passing values to those
methods and receiving returned value from the methods as
needed.
Unlike Python functions, methods do not need to appear before
they are called in a program file. In fact, it is common practice
in Java to put the main() method as the first method in Java
program, similar to what is done in the payMethods sample
program in the chapter.
You should submit a zipped copy of your IntelliJ project folder,
which should contain will contain the two data files within the
project..
You should submit a zipped copy of your IntelliJ project folder.
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