1    /* 
2     * This program features an Arraylist to do its reverse copy thing 
3     * from one file to another. 
4     */
5    package arraylistplay;
6    
7    import java.io.File;
8    import java.io.FileNotFoundException;
9    import java.io.IOException;
10   import java.io.PrintWriter;
11   import java.util.Scanner;
12   
13   public class ReverseCopy2 {
14       public static void main(String[] args) throws FileNotFoundException, IOException {
15           String inputFileName = "lyrics2.text";
16           String outputFileName = "lyrics2reversed.text";
17           java.util.ArrayList<String> words = realWordsFromFile(inputFileName);
18           writeWordsToFile(words, outputFileName);
19       }
20   
21       private static java.util.ArrayList<String> realWordsFromFile(String inputFileName) throws FileNotFoundException {
22           // Equate a scanner with the input file
23           Scanner scanner = establishScanner(inputFileName);
24           // Read words from the file into a dynamically growing ArrayList
25           java.util.ArrayList<String> words = new java.util.ArrayList<>();
26           while (scanner.hasNext()) {
27               String word = scanner.next();
28               words.add(word);
29           }
30           // return the words
31           return words;
32       }
33   
34       private static void writeWordsToFile(java.util.ArrayList<String> words, String outputFileName) throws IOException {
35           // Equate a printer with an output file
36           PrintWriter printer = getPrintWriter(outputFileName);
37           // Print the words to the file
38           for (int x = words.size() - 1; x >= 0; x = x - 1) {
39               printer.println(words.get(x));
40           }
41           printer.close();
42       }
43   
44       private static Scanner establishScanner(String inputFileName) throws FileNotFoundException {
45           String fullFileName = createFullFileName(inputFileName);
46           return new Scanner(new File(fullFileName));
47       }
48   
49       private static PrintWriter getPrintWriter(String outputFileName) throws FileNotFoundException {
50           String fullFileName = createFullFileName(outputFileName);
51           PrintWriter printer = new PrintWriter(fullFileName);
52           return printer;
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 users 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