Create a class called Student. Write a student manager program to manipulate the student information from files by using FileInputStream and FileOutputStream.

Program:-

import java.io.*;

import java.util.*;

class studentmanager

{

            String name;

            int rollno;

           

            static Scanner s = new Scanner(System.in);

    BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

  

    void getinfo()

    {

                        System.out.println("Enter Student Roll No: ");     

                        rollno = s.nextInt();

                        System.out.println("Enter Student Name: ");

                        try{     

                        name = br.readLine();

                        }catch(Exception e){System.out.println("Exception occurred...");}

            }

           

    void addinfo()

            {

                        try

                        {

                                    FileOutputStream os = new FileOutputStream("studentinfo.txt",true);

                                   

                                    byte b[]=name.getBytes();

                                    os.write((char)rollno);

                                    os.write('\n');

                                    os.write(b); 

                                    os.write('\n'); 

            os.close();

                                   

                                    System.out.println("Success...");     

                        }

                        catch(Exception e)

                        {

                                    System.out.println("IO Exception Occured...");

                        } 

            }

           

            void readinfo()

            {

                          try

                          {

                                    FileInputStream fin=new FileInputStream("studentinfo.txt");   

                           

                                    while(true)

            {

                int a=fin.read();

                if(a==-1)

                    break;

                System.out.println("Roll No: "+a);

                a=fin.read();

                System.out.println("Name: ");

                do

                {

                    a=fin.read();

                    System.out.print((char)a);

                }while(a!='\n');

            }

                          }

          catch(Exception e)

          {

                                      System.out.println(e);

                          }   

            }

}

class u81 extends studentmanager

{

            public static void main(String a[])

            {

                        int ch;

                        char c='y';

                        while(c=='y')

                        {

                                    System.out.println("Enter Choice: \n1.Add Student Detail \n2.Show Data");

                                    ch=s.nextInt();

                                    studentmanager o = new studentmanager();

                                   

                                    switch(ch)

                                    {

                                                case 1:

                                                                        o.getinfo();

                                                                        o.addinfo();

                                                                        break;

                                                case 2:

                                                                        o.readinfo();

                                                                        break;

                                                default:

                                                                        System.out.println("Incorrect Menu Option..");

                                    }

                                    System.out.println("Continue? Press y :Exit-Press n");

                                    c=s.next().charAt(0);

                        }                     

            }

}