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