Thread: HW-how to read a string from a text file

I received this homework assignment, it basically tells me to read GPAs of male and female students from a text file and then output averages to another text file.

This is an idea of what the file looks like that is read:
f 3.40
f 4.00
m 3.56
m 3.80
f 2.30
f 3.95

My question is how do I read whether the character before the gpa is "m" or "f"?

This is what I have so far:

import java.io.*;
import java.util.*;
 
public class HW2 {
 
  public static void main (String[] args) throws FileNotFoundException {
 
    double mGPA, fGPA;
    String m,f;
    double mGPAsum = 0;
    double fGPAsum = 0;
    int numberMales = 0;
    int numberFemales = 0;
 
 
    Scanner inFile=new Scanner(new FileReader("input.txt"));
    PrintWriter outFile = new PrintWriter("outputGPA.txt");
 
    while (inFile.hasNext()) {
 
      if (inFile.equals("f")) {
        double gpa = inFile.nextDouble();
        fGPAsum += gpa;
        numberFemales++;
      }
 
      if (inFile.equals("m")) {
        double gpa = inFile.nextDouble();
        mGPAsum += gpa;
        numberMales++;
      }
    }
 
    outFile.println("Sum female GPA = " + fGPAsum);
    outFile.println("Sum male GPA = " + mGPAsum);
    outFile.println("Female count = " + numberFemales);
    outFile.println("Male count = " + numberMales);
 
    fGPA = fGPAsum / numberFemales;
    mGPA = mGPAsum / numberMales;
 
    outFile.println("Average female GPA = " + fGPA);
    outFile.println("Average male GPA = " + mGPA);
 
    inFile.close();
    outFile.close();
  }
}

And this is what it's saying:

2 warnings found:

Warning: The local variable m is never read

Warning: The local variable f is never read