ObjectOutputStream ObjectInputStream

Question

Given the following user-defined class named student (default package):
Student.java
import java.io.Serializable;
public class Student implements Serializable(
public String name;
public String matricNo;

public Student(String name, String matricNo)
{ this.name = name;
this.matricNo = matricNo;
}

Given a data file, named studentcgpa.dat (refer file attached) consists of a few records Each record encompasses id, student, gpa and cgpa. The data types for each attribute are as follows:
studentcepa.dat
<id> : int
<student> 1 Student
<gpa> : double
<cepa> : double

Read the given data file studentcgpa.dat using objectInputstream class, display on console and write the following information to a file named studentresult.dat using ObjectOutputStream class:
• Students' name and matric no, whose gpa and cgpa is greater than 2.5.
• Number of student with cgpa greater than or equal to 3.5.

I got confused how many class should i have and is it attribute in student class not same as obj

Answer 1

See if this helps

http://tutorials.jenkov.com/java-io/objectoutputstream.html