file_exception.java

import java.io.*;
import java.util.*;

class Student implements Serializable{
	private int id;
	private String name;
	
	public void getData(){
		int i;
		String n;
		Scanner input = new Scanner(System.in);
		System.out.println("Enter ID:");
		i = input.nextInt();
		input.nextLine();
		System.out.println("Enter Name:");
		n = input.nextLine();
		this.setId(i);
		this.setName(n);
		
	}
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String toString(){
		String temp="ID: "+this.id+" Name: "+this.name;
		return temp;
	}
}
class StudentArray{
	private Student [] s;
	public StudentArray(){
		s = new Student[3];
		try{
			//writing file
			FileOutputStream fout = new FileOutputStream("course.ser");
			ObjectOutputStream out = new ObjectOutputStream(fout);
			for(int i=0;i<3;i++){
				s[i] = new Student();
				s[i].getData();
				out.writeObject(s[i]);
			}
			out.flush();
			System.out.println("Success");
			out.close();
		}catch(Exception e){
			System.out.println(e);
		}
	}
	public void displayStudent(){
		try{
			//reading file
			FileInputStream  fin = new FileInputStream("course.ser");
			ObjectInputStream in = new ObjectInputStream(fin);
			Student s = null;

			while((s=(Student)in.readObject())!=null){
				System.out.println(s);
			}
			in.close();
			
		}catch(Exception e){
			System.out.println(e);
		}
	}
	
}

public class TestAssignment {

	public static void main(String[] args) {
		
		StudentArray s = new StudentArray();
		s.displayStudent();
		
	}

}