Java IO not displaying file data - java-io

Question

Okay, I guess I'm stuck here. Can't get the values from the file to show in JOptionPane's message dialog box where it's enclosed within a while loop.
Right now I don't know which method of Input/Output stream to use to display all the data on this file which I believed to be serialized as UTF8??
Please tell me what to do and what things I missed since I'm new to java.io classes.
Also, the file StudentData.feu was just given to me. It's not that I don't want to research on my own because I already did, I'm just stuck. I read the Javadoc but I'm clueless right now.
import java.io.*;
import javax.swing.JOptionPane;
public class MyProj {
public void showMenu() {
String choice = JOptionPane.showInputDialog
(null, "Please enter a number: " + "\n[1] All Students" + "\n[2] BSCS Students" + "\n[3] BSIT Students"
+ "\n[4] BSA Students" + "\n[5] First Year Students" + "\n[6] Second Year Students" + "\n[7] Third Year Students"
+ "\n[8] Passed Students" + "\n[9] Failed Students" + "\n[0] Exit");
int choiceConvertedString = Integer.parseInt(choice);
switch(choiceConvertedString){
case 0:
JOptionPane.showMessageDialog(null, "Program closed!");
System.exit(1);
break;
}
}
DataInputStream myInputStream;
OutputStream myOutputStream;
int endOfFile = -1;
double grades;
int studentNo;
int counter;
String studentName;
String studentCourse;
public void readFile()
{
try
{
myInputStream = new DataInputStream
(new FileInputStream("C:\\Users\\Jordan's Pc\\Documents\\NetBeansProjects\\MyProj\\StudentData.feu"));
try{
while((counter=myInputStream.read()) != endOfFile)
{
studentName = myInputStream.readUTF();
studentCourse = myInputStream.readUTF();
grades = myInputStream.readDouble();
JOptionPane.showMessageDialog
(null, "StdNo: " + studentNo + "\n"
+ "Student Name: " + studentName + "\n"
+ "Student Course: " + studentCourse + "\n"
+ "Grades: " + grades);
}
}
catch(FileNotFoundException fnf){
JOptionPane.showMessageDialog(null, "File Not Found");
}
}/* end of try */
catch(EOFException ex)
{
JOptionPane.showMessageDialog(null, "Processing Complete");
}
catch(Exception e)
{
JOptionPane.showMessageDialog(null, "An error occured");
}
}
}

Answer 1

while((counter=myInputStream.read()) != endOfFile)
The problem is probably here. You're reading a byte and then throwing it away. It isn't likely that the file contains extra bytes like this that are intended to be thrown away. The correct loop would go like this:
try
{
for (;;)
{
// .... readUTF() etc
}
}
catch (EOFException exc)
{
// You've read to end of file.
}
// catch IOException etc.