1    /* 
2    * Program featuring straight up arrays and file IO to read and reverse copy a lyric.3     */
3    package arrayplay;
4    import java.io.File;
5    import java.io.FileNotFoundException;
6    import java.io.IOException;
7    import java.io.PrintWriter;
8    import java.util.Scanner;
9    
10   public class ReverseCopy {
11       public static void main(String[] args) throws FileNotFoundException, IOException {
12           String inputFileName = "TheNeedToKnow.text";
13           String outputFileName = "TheNeedToKnowReversed.text";
14           String[] words = readWordsFromFile(inputFileName);
15           writeWordsToFile(words, outputFileName);
16       }
17   
18       private static final int LIMIT = 1000;
19   
20       private static String[] readWordsFromFile(String inputFileName) throws FileNotFoundException {
21   
22           // Equate a scanner with the input file
23           Scanner scanner = establishScanner(inputFileName);          //
24           // Read the words from the file into an oversized array
25           String[] temp = new String[LIMIT];
26           int index = 0;
27           while (scanner.hasNext()) {
28               String word = scanner.next();
29               temp[index] = word;
30               index = index + 1;
31           }
32           int wordCount = index;
33           // Transfer the words to a perfectly sized array
34           String[] words = new String[wordCount];
35           for (int x = 0; x < wordCount; x = x + 1) {
36               words[x] = temp[x];
37           }
38           // Return the words
39           return words;
40       }
41   
42       private static void writeWordsToFile(String[] words, String outputFileName) throws IOException {
43           // Equate a printer with an output file
44           PrintWriter printer = getPrintWriter(outputFileName);
45           // Print the words to the file
46           for (int x = words.length - 1; x >= 0; x = x - 1) {
47               printer.println(words[x]);
48           }
49           printer.close();
50       }
51   
52       private static Scanner establishScanner(String inputFileName) throws FileNotFoundException {
53           String fullFileName = createFullFileName(inputFileName);
54           return new Scanner(new File(fullFileName));
55   
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       // Create the full file name for a simple file name, assuming that it will be
64       // found in the CS1Files/data subdirectory of the user’s home directory.
65   
66   
67       private static String createFullFileName(String fileName) {
68           String separator = System.getProperty("file.separator");
69           String home = System.getProperty("user.home");
70           String path = home + separator + "CS1Files" + separator + "data" + separator;
71           String fullFileName = path + fileName;
72           return fullFileName;
73       }
74   
75   }
76