I would need to provide students.dat file. I am not sure how to send that students.dat file. This program need to work on Replit. Please make the code work and check the picture attached for instructions. // The Student Records Algorithm Program // This is the student, starting version of the assignment. import java.io.*; import java.util.*; import java.text.DecimalFormat; public class Main { public static void main(String[] args) throws IOException { List studentArray = new List(100); studentArray.getList(); studentArray.display("UNSORTED LIST OF STUDENTS"); studentArray.pause(); studentArray.gpaSort(); studentArray.display("STUDENTS SORTED IN DESCENDING ORDER BY GPA"); studentArray.pause(); studentArray.ageSort(); studentArray.display("STUDENTS SORTED IN ASCENDING ORDER BY AGE"); studentArray.pause(); studentArray.idSort(); studentArray.display("STUDENTS SORTED IN ASCENDING ORDER BY ID#"); studentArray.pause(); // int studentID = getID(); // int index = studentArray.search(studentID); // // if (index == -1) // System.out.println("There is no student with an ID# of "+studentID+".\n"); // else // { // studentArray.displayStudent(index); // displays the information for the found student // studentArray.delete(index); // remove the same student from the array // studentArray.display("STUDENTS SORTED IN ASCENDING ORDER BY ID# WITHOUT STUDENT# "+studentID); // studentArray.pause(); // } } public static int getID() { Scanner input = new Scanner(System.in); System.out.print("\nEnter the 6-digit ID of the student. { 100000 - 999999 } --> "); return input.nextInt(); } } class Person { public String name; public int id; public int age; public double gpa; Person(String n, int ID, int a,double g) { name = n; id = ID; age = a; gpa = g; } } class List { private Person student[]; // stores array elements private int capacity; // actual array capacity private int size; // number of elements in the array public List(int c) { capacity = c; size = 0; student = new Person[capacity]; } public void getList() throws IOException { FileReader inFile = new FileReader("students.dat"); BufferedReader inStream = new BufferedReader(inFile); String s1,s2,s3,s4; int age, id; double gpa; int index = 0; while( ((s1 = inStream.readLine()) != null) && ((s2 = inStream.readLine()) != null) && ((s3 = inStream.readLine()) != null) && ((s4 = inStream.readLine()) != null) ) { String name = s1; id = Integer.parseInt(s2); age = Integer.parseInt(s3); gpa = Double.parseDouble(s4); student[index] = new Person(name,id,age,gpa); index++; } inStream.close(); size = index; } private String spaces(String name) { int tab = 24 - name.length(); String temp = ""; for (int j = 1; j <= tab; j++) temp += " "; return temp; } public void display(String listInfo) { DecimalFormat output = new DecimalFormat("0.000"); System.out.println("\nDISPLAYING "+ listInfo); System.out.println("\nStudent ID# Student Name Age GPA"); System.out.println("============================================================"); for (int k = 0; k < size; k++) System.out.println(student[k].id + " "+student[k].name + spaces(student[k].name) + student[k].age + " " + output.format(student[k].gpa)); } public void pause() { Scanner input = new Scanner(System.in); String dummy; System.out.println("\nPress to continue."); dummy = input.nextLine(); } public void displayStudent(int index) { System.out.println "Student" + System.out.println } private void swap(int x, int y) { boolean found = false; } public void gpaSort() { } public void ageSort() { for(int k = 0; k < numbers1.length; k++) int elements = k+1; } public void idSort() { } // public int search(int studentID) // { boolean found = false; int low; int high = list.size()-1; int mid = -1; while(low) // } public void delete(int index) { // Precondition: "index" stores the index of a student object that exists in the "student" array. // Postcondition: The student object at index "index" is removed from the "student" array. // All other objects in the "student" array are unaffected.
I would need to provide students.dat file. I am not sure how to send that students.dat file. This program need to work on Replit. Please make the code work and check the picture attached for instructions.
// The Student Records
// This is the student, starting version of the assignment.
import java.io.*;
import java.util.*;
import java.text.DecimalFormat;
public class Main
{
public static void main(String[] args) throws IOException
{
List studentArray = new List(100);
studentArray.getList();
studentArray.display("UNSORTED LIST OF STUDENTS");
studentArray.pause();
studentArray.gpaSort();
studentArray.display("STUDENTS SORTED IN DESCENDING ORDER BY GPA");
studentArray.pause();
studentArray.ageSort();
studentArray.display("STUDENTS SORTED IN ASCENDING ORDER BY AGE");
studentArray.pause();
studentArray.idSort();
studentArray.display("STUDENTS SORTED IN ASCENDING ORDER BY ID#");
studentArray.pause();
// int studentID = getID();
// int index = studentArray.search(studentID);
//
// if (index == -1)
// System.out.println("There is no student with an ID# of "+studentID+".\n");
// else
// {
// studentArray.displayStudent(index); // displays the information for the found student
// studentArray.delete(index); // remove the same student from the array
// studentArray.display("STUDENTS SORTED IN ASCENDING ORDER BY ID# WITHOUT STUDENT# "+studentID);
// studentArray.pause();
// }
}
public static int getID()
{
Scanner input = new Scanner(System.in);
System.out.print("\nEnter the 6-digit ID of the student. { 100000 - 999999 } --> ");
return input.nextInt();
}
}
class Person
{
public String name;
public int id;
public int age;
public double gpa;
Person(String n, int ID, int a,double g)
{
name = n;
id = ID;
age = a;
gpa = g;
}
}
class List
{
private Person student[]; // stores array elements
private int capacity; // actual array capacity
private int size; // number of elements in the array
public List(int c)
{
capacity = c;
size = 0;
student = new Person[capacity];
}
public void getList() throws IOException
{
FileReader inFile = new FileReader("students.dat");
BufferedReader inStream = new BufferedReader(inFile);
String s1,s2,s3,s4;
int age, id;
double gpa;
int index = 0;
while( ((s1 = inStream.readLine()) != null) &&
((s2 = inStream.readLine()) != null) &&
((s3 = inStream.readLine()) != null) &&
((s4 = inStream.readLine()) != null) )
{
String name = s1;
id = Integer.parseInt(s2);
age = Integer.parseInt(s3);
gpa = Double.parseDouble(s4);
student[index] = new Person(name,id,age,gpa);
index++;
}
inStream.close();
size = index;
}
private String spaces(String name)
{
int tab = 24 - name.length();
String temp = "";
for (int j = 1; j <= tab; j++)
temp += " ";
return temp;
}
public void display(String listInfo)
{
DecimalFormat output = new DecimalFormat("0.000");
System.out.println("\nDISPLAYING "+ listInfo);
System.out.println("\nStudent ID# Student Name Age GPA");
System.out.println("============================================================");
for (int k = 0; k < size; k++)
System.out.println(student[k].id + " "+student[k].name + spaces(student[k].name) + student[k].age + " " + output.format(student[k].gpa));
}
public void pause()
{
Scanner input = new Scanner(System.in);
String dummy;
System.out.println("\nPress <Enter> to continue.");
dummy = input.nextLine();
}
public void displayStudent(int index)
{
System.out.println "Student" +
System.out.println
}
private void swap(int x, int y)
{
boolean found = false;
}
public void gpaSort()
{
}
public void ageSort()
{
for(int k = 0; k < numbers1.length; k++)
int elements = k+1;
}
public void idSort()
{
}
// public int search(int studentID)
// {
boolean found = false;
int low;
int high = list.size()-1;
int mid = -1;
while(low)
// }
public void delete(int index)
{
// Precondition: "index" stores the index of a student object that exists in the "student" array.
// Postcondition: The student object at index "index" is removed from the "student" array.
// All other objects in the "student" array are unaffected.
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