Using basic knowledge of Java complete the following: Attached is a data file co

Question

Using basic knowledge of Java complete the following:

Attached is a data file containing student information named Students.txt. The info includes a first name, phone number, email and gpa (separated by comma). You are supposed to write a program, that:

1.) creates a Student class to store first name, phone number, email and gpa.

2.) reads all of the lines in “Students.txt”; creates a Student object for each line

3.) saves all the Student objects in a Student Array

4.) loop through the Student array to display how many students have a 3.0 gpa or higher

Hints:

1) Each line read from Students.txt can be spitted by using:

String[] values = line.split(",") ;

2) The following shows how to convert from String to double

double gpa = Double.parseDouble(gpaString);

There is a lot of data in the text file that is formatted as such:

Which is Name,StudentID,Email,GPA

Explanation / Answer

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class StudentFileProcess {
    class Student {

String firstName;
String phoneNumber;
String email;
double gpa;
/**
* @param firstName
* @param phoneNumber
* @param email
* @param gpa
*/
public Student(String firstName, String phoneNumber, String email, double gpa) {
super();
this.firstName = firstName;
this.phoneNumber = phoneNumber;
this.email = email;
this.gpa = gpa;
}
}
    public static void main(String args[]) {
        Student[] studentArray = new Student[10000];
int countStud = 0;
Scanner fileReader = new Scanner(new File("Students.txt"));
while (fileReader.hasNextLine()) {

String student = fileReader.nextLine();
String[] studArray = student.split(",");
double gpa = Double.parseDouble(studArray[3]);

Student stud = new StudentFileProcess().new Student(studArray[0], studArray[1], studArray[2], gpa);
studentArray[countStud++] = stud;

}
int countGpaGr3 = 0;
for (int i = 0; i < countStud; i++) {
if (studentArray[i].gpa >= 3.0) {
countGpaGr3++;
}
}

String output = String.format("There are totally %d students having GSP greater than %.2f", countGpaGr3, 3.0);
System.out.println(output);
    }
}

Output:
Program tested with 10 records in input file. Program can handle even 10000 records
There are totally 5 students having GSP greater than 3.00

Related Questions

Navigate

• Browse (All)
• Browse U
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.