Help me with my java code

Question

i have an assignment from the book java programming d.s malik.
problem:
for research purposes and to assist students, the admissions office of your local university wants to determine the performance of the female and male students in certain courses. You receive a file that contains female and male students' GPAs for certain courses. Due to confidentiality, the letter code f is used for female and m is used for male. every file entry consists of a letter code followed by a GPA. each line has one entry. the number of entries in the file is unknown. write a program that computes and outputs the average gpa for both female and male students. format your result to two decimal places.
solution:
this is what i have come up with:
import java.io.*;
import java.util.*;
class Assignment6
     public static void main(String[] args)
                              throws FileNotFoundException
           String str,
                     gender;
           double counter = 0;
           double counter2 = 0;
           double gpa = 0;
           double sum1, sum2;
           double average1, average2;
           Scanner console = new Scanner(System.in);
           Scanner inFile = new Scanner(new FileReader("gpa.txt"));
           PrintWriter outFile = new PrintWriter("gpa.out");
           gender = inFile.next();
           gpa = inFile.nextDouble();
           while(gender.charAt(0) != 'x')
                if(gender == 'm')
                    sum1+= gpa;
                   counter = counter + 1.0;
                   average1 = sum1/counter;
               else if(gender == 'f')
                    sum2+= gpa;
                    counter2 = counter2 + 1.0;
                    average2 = sum2/counter2;
           System.out.println("The count is " + counter);
           System.out.println("The average is = " + average1);
           System.out.println("The count is " + counter2);
           System.out.println("The average is = " + average2);
          outFile.print("There are " + counter + " male students.");
         outFile.printf("Average GPA for male students is: " + average1);
         outFile.print("There are " + counter2 + " female students.");
         outFile.printf("Average GPA for female students is: " + average2);
         outFile.close();
}and the text file is
gpa.txt
m 2.4
f 3.2
m 3.7
m 4.0
f 2.9
f 1.8
f 3.8
m 1.7
m 3.4
f 2.6
m 2.8
m 1.7
f 3.7
m 3.9
f 4.0
f 3.6
m 2.3
f 2.9
m 3.0
m 2.7
x
question:
i couldn't compile and run it, i get 2 errors:
M:\School\CSCI - 111 - Classwork\Assignments\Java1\Assignment6.java:29: incomparable types: java.lang.String and char
               if(gender == 'm')
               ^
M:\School\CSCI - 111 - Classwork\Assignments\Java1\Assignment6.java:35: incomparable types: java.lang.String and char
               else if(gender == 'f')
thanks

Answer 1

okay i did everything, but i still couldn't get it to work. i wonder if im using a wrong solution. or is there anything i didn't know before even proceeding into this?
update:
import java.io.*;
import java.util.*;
class Assignment6
     public static void main(String[] args)
                              throws FileNotFoundException
           String str,
                    gender;
           double cntMale = 0;
           double cntFemale = 0;
           double gpa = 0;
           double sumMale = 0, sumFemale = 0;
           double avgMale = 0, avgFemale = 0;
           Scanner console = new Scanner(System.in);
           Scanner inFile = new Scanner(new FileReader("gpa.txt"));
           PrintWriter outFile = new PrintWriter("gpa.out");
           gender = inFile.next();
           gpa = inFile.nextDouble();
           while(gender.charAt(0) != 'x')
                if(gender.charAt(0) == 'm')
                    sumMale+= gpa;
                   cntMale = cntMale + 1.0;
               else if(gender.charAt(0) == 'f')
                    sumFemale+= gpa;
                    cntFemale = cntFemale + 1.0;
          avgMale = sumMale/cntMale;
          avgFemale = sumFemale/cntFemale;
           System.out.println("The count is " + cntMale);
           System.out.println("The average is = " + avgMale);
           System.out.println("The count is " + cntFemale);
           System.out.println("The average is = " + avgFemale);
          outFile.print("There are " + cntMale + " male students.");
         outFile.printf("Average GPA for male students is: " + avgMale);
         outFile.print("There are " + cntFemale + " female students.");
         outFile.printf("Average GPA for female students is: " + avgFemale);
          inFile.close();
         outFile.close();
}Edited by: spkenn5 on Nov 9, 2008 4:31 PM