Question

JAVA

6. Create two files and name them: puzzle.txt and puzzle2.txt

Inside puzzle.txt, write the following text:

MWTaahyiebt_e,c__hnyaoontuc;'e_rste_r_aynr_oert_e_gasoduoipdnp_got_shoeandtl__yty_oot_uhrree__apTdrH_oItgRhrDia_sml__eowtnotere.kr_ss_.

Inside puzzle2.txt, write the following text:

WTTohhriikssi__niigss,___ttbhhueet___wryrioogunh'gtr__emm_eessshssoaawggieen__gff_rrtoohmme___sswaarmmoppnllgee_22o..nttexxstt

Open a file specified by the user. This file will contain a bunch of characters. You should read in each character from the file, one character at a time. Display every third character on the screen. Throw the other characters away.

There is a sample input file called puzzle.txt, containing a little message you can use to test your program.

Sample Output:

Open which file: puzzle2.txt

This_is_the_right_message_from_sample2.txt

Answer 1

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

public class Demo248{

    public static void main(String[] args){

        System.out.println("Open which file:");
        Scanner sc = new Scanner(System.in);
        String str = sc.nextLine();
        try {
            FileInputStream fin = new FileInputStream(str);
            char current;
            int count = 0;
            while (fin.available() > 0) {
               current = (char) fin.read();
               count++;
               if (count == 3){
                   System.out.print(current);
                   count = 0;
               }
            }
            System.out.println("");
        }
        catch (Exception e){
        }

    }
}