HashMap and Input/Out Put file

Please help to give me direction. I am not sure how I approach this school project. What I want to do is to write student data in a text file and be able to read the file into a HashMap. The two classes I am using are as follows:
import java.util.Set;
import java.util.HashMap;
import java.util.Iterator;
public class University
{
private HashMap schools;
private HashMap students;

/**
* Constructor for objects of class University.
*/
public University()
{
students = new HashMap();

public void setEnrolStudentInSchool(String schoolCode, String studentId, String name, String e_MailAddress, double secondarySchoolAverage)
{
students.put(studentId.toLowerCase(), new Student(studentId.toLowerCase(), name, e_MailAddress, secondarySchoolAverage, schoolCode));
}
}
public class Student
{
private String studentId;
private String name;
private String e_MailAddress;
private double secondarySchoolAverage;
// School code where the student is enrolled.
private String schoolCode;

public Student(String studentId, String name, String e_MailAddress,
double secondarySchoolAverage, String schoolCode)
{
this.studentId = studentId;
this.name = name;
this.e_MailAddress = e_MailAddress;
this.secondarySchoolAverage = secondarySchoolAverage;
this.schoolCode = schoolCode;
}
}
Thanks
Mulugeta

The first thing we have to do is clarify your problem. Here's my interpretation: You have a file with student data in it, one student per line.
You want to read a line from that file, make a Student object, and then store the Student object in a HashMap. Each student has a studentId and that studentID is to be used as the key when storing the Student object in the HashMap.
Is that correct?
Better still post the original assignment description.

How about some code samples from sun?

Hi Barry,
Your interpretation of my problem is correct.
Thank you very much.
Mulugeta

That was a good idea, William. Here's one of those:

import java.io.*;
public class TestBufferedReader
{
    public static void main(String[] args)
    {
        String text; 
        try 
        {
            // Creates a BufferedReader object that takes a
            // FileReader object as an argument. The FileReader
            // associates an object with the file to be read.
            BufferedReader br =
                   new BufferedReader(
                   new FileReader("texttoread.txt"));
            // The while loop calls the readLine method as long as
            // there is a line of characters to be read. 
            while ((text = br.readLine()) != null)
            {
                System.out.println(text);
            }
            // Always close a file after opening.
            br.close();
        }
        // Catch and handle the exception in the
        // event that the named file cannot be found.
        catch (FileNotFoundException fnfe)
        {
            System.out.println(fnfe);
            return;
        }
        // Catch and handle an exception if there is
        // a problem reading the file.
        catch (IOException ioe)
        {
            System.out.println(ioe);
        }
    }
}

Mulugeta, that's going to help you read the file in. Create a text file containing a few Students' data. And let this program read and print the contents. After you have done that we can convert the Strings read in into Student objects.
Try to find out about the java.util.StringTokenizer class, you will need that too.