I have this lab I\'ve been trying to work on but I can\'t figure out how to comp
ID: 3821391 • Letter: I
Question
I have this lab I've been trying to work on but I can't figure out how to complete it. Here are all the resources provided by the instructor.
LAB07, Array of Student Class objects – Bubble Sort Points: 25
OBJECTIVE
• To demonstrate the concept of sorting
• To demonstrate the Bubble sort
• To demonstrate sorting objects
REQUIRED
A report of your work, in a flat pocket folder, in the following order:
1. Grade form Lab07GradeForm.doc
2. This program description
3. The source listing of the Student class Student.java
4. Problem Analysis with Input, Output, Pseudocode (word processed)
5. Data dictionary (included as comments in Java program
6. The listing of the source program Lab07.java
7. Listing of the input file Lab07StudentFile.txt
8. Listing of the student name file Lab07Names.txt
8. Listing of the expected results (already created) Lab07ExpectedResults.xlsx
9. Listing of the output file Lab07Report.txt
SPECIFICATIONS
Start with Lab06 and rename it as Lab07
There were two parts to Lab06:
Part1 – create an array of objects and then place values into the objects in the array
Part2 – retrieve the objects from the array and print a report
Lab07 will insert a step in between –- Sorting the array of objects
Create a Bubble Sort method and pass the array to it. Using the Bubble sort, sort the array in descending order, by average Since arrays are referenced when passed to a method, there is no need to return the array.
In order for this to work properly: Part1 must create the complete array and nothing else Then the array is sorted Part2 retrieves objects from the array and creates the report, with the student name. Therefore, the name search must be after the sort.
The report should look the same as Lab06 except it will be in descending order by average.
INPUT
File: Student file Lab07StudentFile.txt
Record: Student record
Field Data Type
Student id# 4 numbers (ex. 1234)
Ten test scores integers (valid numbers are 0 -100)
INPUT
File: Student name file Lab07Names.txt
Record: Student name record
Field Data Type
Student id# 4 numbers (ex. 1234)
Student name String
OUTPUT
File: Grade Report file Lab07Report.txt
Record:
Student Grade Report, sorted by Avg
ID# Name /----------------TEST Scores---------------/ Total Adj Total Avg
xxxx xxxxxxxxxxxxxxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxxx xxxx xxx
xxxx xxxxxxxxxxxxxxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxxx xxxx xxx
xxxx xxxxxxxxxxxxxxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxxx xxxx xxx
Total students = xx
Here's the link to the completed lab06 which it builds upon.--> https://pastebin.com/4cxF0YGb
Here's the link to the completed Student Class file.--> https://pastebin.com/DvZvKq2M
Explanation / Answer
Hi, Please find my implementation of Bubble Sort for Student Array.
Please let me know in case of any issue.
//Lab06
//this makes available all extra utilities from Java library including scanner
import java.util.*;
//this makes available all extras from Java library needed for files
import java.io.*; //needed for files
public class Lab06
{
//start of class
public static void bubbleSort(Student[] student){
int n = student.length;
for (int i = 0; i < n-1; i++)
// Last i elements are already in place
for (int j = 0; j < n-i-1; j++) {
if (student[j].getAdjustedAverage() > student[j+1].getAdjustedAverage()){
Student temp = student[j];
student[j] = student[j+1];
student[j+1] = temp;
}
}
}
public static void main(String[] args) throws FileNotFoundException
{//start of main method
//declare a variable of type Scanner
Scanner infileName = new Scanner(new FileReader("Lab06StudentFile.txt"));
PrintWriter outfileName = new PrintWriter ("Lab06Report.txt");
//variables and defined constants
int stdId; //student id number
int[] scores = new int[10]; //test scores
int x = 0; //variable for a single instance of the student class
int student = 0; //student variable initialized to zero
Student[] arrayStudent = new Student[16]; //array of student class objects
//create an instance of printwriter object
outfileName.println("Student Grade Report");
outfileName.println();
outfileName.println("ID# Name /-------------------Test Scores----------------/ Total AdjTotal Avg");
outfileName.println();
//read score until end of file
while(infileName.hasNext())
{//start while loop
stdId = infileName.nextInt();
for (int i = 0; i < scores.length; i++)
{
scores[i] = infileName.nextInt();
}
Student std = new Student(stdId, scores);
arrayStudent[x] = std;
x++;
student++;
}//end while
//Callig sort method
bubbleSort(arrayStudent);
for (int j = 0; j < arrayStudent.length; j++)
{//start for loop
Student std = arrayStudent[j];
outfileName.printf("%-5d", std.getStudentId());
scores = std.getStudentGradeArray();
outfileName.printf("%-20s", searchName(std.getStudentId()));
for (int i = 0; i < scores.length; i++)
{
outfileName.printf("%-5d", scores[i]);
}
//write total, ajdusted total and adjusted average
outfileName.printf("%8.0f%8.0f%8.0f",
std.getTotal(),
std.getAdjustedtotal(),
std.getAdjustedAverage());
outfileName.println();
}//end for loop
outfileName.println();
outfileName.printf ("Total "
+ "Students = %2d", student);
infileName.close();
outfileName.close();
}//end of main
public static String searchName(int searchNumber) throws FileNotFoundException
{//begin method
Scanner infileName = new Scanner (new FileReader("Lab06Names.txt"));
boolean found = false;
String returnName = "name not found";
while (infileName.hasNext() && found == false)
{//start while loop
int stdId = infileName.nextInt();
String searchName = infileName.nextLine().trim();
{
if(searchNumber == stdId)
{
returnName = searchName;
found = true;
}
}
}//end while
infileName.close();
return returnName;
}//end of method
}//end of class