1 /*
 2  * To change this license header, choose License Headers in Project Properties.
 3  * To change this template file, choose Tools | Templates
 4  * and open the template in the editor.
 5  */
 6 package arraylistplay;
 7 
 8 import java.io.File;
 9 import java.io.FileNotFoundException;
10 import java.io.IOException;
11 import java.io.PrintWriter;
12 import java.util.Scanner;
13 import java.util.ArrayList;
14 /**
15  *
16  * @author jfernan6
17  */
18 public class ReverseCopy {
19 
20     /**
21      * @param args the command line arguments
22      */
23     public static void main(String[] args) throws FileNotFoundException {
24          String inputFileName = "47Elements.text";
25          String outputFileName = "47ElementsReversed.text";
26          ArrayList<String> words = readWordsFromFile(inputFileName);
27          writeWordsToFile(words,outputFileName);
28      }
29  
30      private static ArrayList<String> readWordsFromFile(String inputFileName) throws FileNotFoundException {
31          //Equate a scanner with the input file
32          Scanner scanner = establishScanner(inputFileName);
33          //Read the words from he file into a dynamically growing ArrayList
34          ArrayList<String> words = new ArrayList<>();
35          while ( scanner.hasNext() ) {
36              String word = scanner.next();
37              words.add(word);
38          }
39          //Return the words
40          return words;
41      }
42  
43      private static void writeWordsToFile(ArrayList<String> words, String outputFileName) throws FileNotFoundException {
44          //Equate a printer with an output file
45          PrintWriter printer = getPrintWriter(outputFileName);
46          //Print the words to the file
47          for ( int x = words.size() - 1; x >= 0; x = x - 1 ) {
48              printer.println(words.get(x));
49          }
50          printer.close();
51      }
52  
53      private static Scanner establishScanner(String inputFileName) throws FileNotFoundException {
54          String fullFileName = createFullFileName(inputFileName);
55          return new Scanner(new File(fullFileName));
56      }
57  
58      private static PrintWriter getPrintWriter(String outputFileName) throws FileNotFoundException {
59          String fullFileName = createFullFileName(outputFileName);
60          PrintWriter printer = new PrintWriter(fullFileName);
61          return printer;
62      }
63  
64      //Create the full file name for a simple file name, assuming that it will be
65      //found in the CS1Files/data subdirectory of the user's home directory.
66      private static String createFullFileName(String fileName) {
67          String separator = System.getProperty("file.separator");
68          String home = System.getProperty("user.home");
69          String path = home + separator + "CS1Files" + separator + "data" + separator;
70          String fullFileName = path + fileName;
71         return fullFileName;
72      }
73      
74  }