Read the \"reverse.txt\" file, one line at a time. Print the line reversed. Use

Question

Read the "reverse.txt" file, one line at a time.

Print the line reversed.

Use arraylists.

you cannot use the collections "reverse" method, create your own or put it in code inside a loop.

HINT: use ".add" to re-arrange elements in an arraylist

10 bonus points: use a two dimensional ArrayList of String to read the entire file at once, instead of one line at a time.

import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;


/*
Open the reverse.txt file

*/
public class ReverseFileContents
{
   public static void main(String[] args) throws FileNotFoundException
   {
//
//
//You need to open the "reverse.txt" file here
//
//
//
         while ( inputFile.hasNextLine())
         {
//
//Inside the while loop you will get the line of text
//   one line at a time.
//
//Next, you will reverse the line and print out the "string"
//   of characters on the screen for each line
//   to reveal the ACM code of ethics.
//
         }         
   }
}

Explanation / Answer

1. import java.io.File;
2. import java.io.FileNotFoundException;
3. import java.io.PrintWriter;
4. import java.util.*;
5. 
   
6. class ReverseFileContents
7. {
8. public static void main(String[] args) throws FileNotFoundException
9. {
10. Scanner inputFile = new Scanner(new File("reverse.txt"));
11. ArrayList<String> list = new ArrayList<String>();
12. while(inputFile.hasNext())
13. {
14. list.add(inputFile.nextLine());
15. String s = list.get(list.size()-1);
16. for(int i=s.length()-1; i>=0; i--)
17. System.out.print(s.charAt(i)+" ");
18. System.out.println();
19. }
20. inputFile.close();
21. }
22. }

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