Create a program in Java that will read the CSV file and compute the Final Grade of the student using the computation below: Lab Exercise * 30% + Long Quiz * 30% + Alternative Assessment * 40% = Final Grade Then, display the final grade of each student.
We will be using the java.io package and so far this is what I come up with
import java.io.*;
public class ReadingFile {
public static void main (String[]args){
try{
File myFile = new File("Grades.csv");
BufferedReader br = new BufferedReader(new FileReader(myFile));
String allLines = "";
while((allLines = br.readLine()) != null){
String row [] = allLines.split(",");
double finalGrade = (Double.parseDouble(row[1])*.30) + (Double.parseDouble(row[2])*.30) + (Double.parseDouble(row[3])*.40);
}
}
catch(IOException err){
System.err.println("File not found.");
}
}
}
I know that there are a lot of missing code but this is all what I can do with the best of my knowledge and abilities.
Assume your content of Grades.csv is as below
35,91,24
53,63,73
13,23,33
Some tips
Use try-with-resources statement to ensure that BufferedReader is closed at the end of the statement.
Java uses zero-based indexing, so you should use row[0] to read the first score.
Use a logger or e.printStackTrace() to help you debugging.
public static void main(String[] args) {
try (BufferedReader br = new BufferedReader(new FileReader(new File("Grades.csv")))) {
String allLines;
while ((allLines = br.readLine()) != null) {
String[] row = allLines.split(",");
double finalGrade =
(Double.parseDouble(row[0]) * .30) + (Double.parseDouble(row[1]) * .30) + (Double.parseDouble(row[2]) * .40);
System.out.println(finalGrade);
}
} catch (IOException e) {
System.err.println("some error message");
e.printStackTrace();
}
}
The output will be
47.4
64.0
24.0