1    /* 
2     * Program featuring straight up arrays and file IO to read and reverse copy a lyric 
3     */
4    
5    package arrayplay;
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 ReverseCopy{
14   
15       public static void main(String[] args) throws FileNotFoundException, IOException {
16           String inputFileName = "GloomySunday.text";
17           String outputFileName = "GloomySundayReversed.text";
18           String[] words = readWordsFromFile(inputFileName);
19           writeWordsToFile(words,outputFileName);
20       }
21   
22       private static final int LIMIT = 1000;
23   
24       private static String[] readWordsFromFile(String inputFileName) throws FileNotFoundException {
25             // Equate a scanner with the input file
26             Scanner scanner = establishScanner(inputFileName);
27             // Read the words from the file into an oversized array
28             String[] temp = new String[LIMIT];
29             int index = 0;
30             while (scanner.hasNext()) {
31                 String word = scanner.next();
32                 temp[index] = word;
33                 index = index + 1;
34             }
35             int wordCount = index;
36             //Transfer the words to a perfectly sized array
37             String[] words = new String[wordCount];
38             for (int x = 0; x < wordCount; x = x + 1) {
39                 words[x] = temp[x];
40             }
41             //Return the words
42             return words;
43       }
44   
45       private static void writeWordsToFile(String[] words, String outputFileName) throws IOException {
46           //Equate a printer with an output file
47             PrintWriter printer = getPrintWriter(outputFileName);
48             //print the words to the file
49             for (int x = words.length - 1; x >= 0; x = x - 1) {
50                 printer.println(words[x]);
51             }
52             printer.close();
53       }
54   
55       private static Scanner establishScanner(String inputFileName) throws FileNotFoundException {
56             String fullFileName = createFullFileName(inputFileName);
57             return new Scanner(new File(fullFileName));
58       }
59   
60       private static PrintWriter getPrintWriter(String outputFileName) throws FileNotFoundException {
61             String fullFileName = createFullFileName(outputFileName);
62             PrintWriter printer = new PrintWriter(fullFileName);
63             return printer;
64       }
65   
66       //Create the full file name for a simple file name, assuming that it will be
67       //found in the CS1Files/data subdirectory of the user's home directory.
68       private static String createFullFileName(String fileName) {
69             String separator = System.getProperty("file.separator");
70             String home = System.getProperty("user.home");
71             String path = home + separator + "CS1Files" + separator + "data" + separator;
72             String fullFileName = path + fileName;
73             return fullFileName;
74       }
75   
76   }
77