File/Grade Reading Program

package grade.reader;

import java.util.*;
import java.io.*;
public class GradeReader {

    public static void printGrades(int a, int b, int c, int d, int f, int x)
    {
        System.out.println(a + " student(s) got A's.");
        System.out.println(b + " student(s) got B's.");
        System.out.println(c + " student(s) got C's.");
        System.out.println(d + " student(s) got D's.");
        System.out.println(f + " student(s) got F's.");
        System.out.println(x + " grade(s) were read as invalid.");
    }

    public static void main(String[] args) {


        int a = 0, b = 0, c = 0, d = 0, f = 0, z = 0;
        char grade;
        try{
            Scanner scan = new Scanner(new File("C:\\Users\\Thomas B\\Documents\\Java Programs\\Grade Reader\\src\\grade\\reader\\grades.txt"));
            PrintWriter printer = new PrintWriter(new File("C:\\Users\\Thomas B\\Documents\\Java Programs\\Grade Reader\\src\\grade\\reader\\data.txt"));
            printer.flush();
            while(scan.hasNext())
            {
                grade = scan.next().charAt(0);
                if(grade == 'A')
                {
                    a++;
                }
                else if(grade == 'B')
                {
                    b++;
                }
                else if(grade == 'C')
                {
                    c++;
                }
                else if(grade == 'D')
                {
                    d++;
                }
                else if(grade == 'F')
                {
                    f++;
                }
                else
                {
                    z++;
                }
            }
            printGrades(a, b, c, d, f, z);
            printer.println(a + " A's");
            printer.println(b + " B's");
            printer.println(c + " C's");
            printer.println(d + " D's");
            printer.println(f + " F's");
            printer.println(z + " invalid grades");
            printer.close();
        }catch(FileNotFoundException e){System.out.println("no file");}
    }

}