Practical 13: Refine the student manager program to manipulate the student information from files by using the DataInputStream and DataOutputStream. Assume suitable data

Program :

import java.io.*;

public class practical13 {

    public static void main(String args[]) throws IOException {

        DataInputStream dataIS = new DataInputStream(new FileInputStream("stdinfo.txt"));

        DataOutputStream dataOS = new DataOutputStream(new FileOutputStream("newstdinfo.txt"));

        // manipulate the student information from files

        String str;

        while ((str = dataIS.readLine()) != null) {

            String upper = str.toUpperCase();

            System.out.println(upper);

            dataOS.writeBytes(upper + "  ,");

        }

        dataIS.close();

        dataOS.close();

    }

}

Output: