1    /* 
2    * Program featuring straight ip 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   
14       public class ReverseCopy {
15   
16                  public static void main(String[] args) throws FileNotFoundException, IOException {
17                      String inputFileName = "Believer.text";
18                      String outputFileName = "BelieverReversed.text";
19                      String[] words = readWordsFromFile(inputFileName);
20                      writeWordsToFile(words, outputFileName);
21                  }
22   
23                  private static final int LIMIT = 1000;
24   
25                  private static String[] readWordsFromFile(String inputFileName) throws FileNotFoundException {
26                      // Equate a scanner with the input file
27                      Scanner scanner = establishScanner(inputFileName);
28                      // Read the words from the file into an oversized array
29                      String[] temp = new String[LIMIT];
30                      int index = 0;
31                      while ( scanner.hasNext() ) {
32                              String word = scanner.next();
33                              temp[index] = word;
34                              index = index + 1;
35                          }
36                      int wordCount = index;
37                      // Transfer the words to a perfectly sized array
38                      String[] words = new String[wordCount];
39                      for ( int x = 0; x < wordCount; x = x + 1 ) {
40                              words[x] = temp[x];
41                          }
42                     // Return the words
43                      return words;
44                  }
45   
46                  private static void writeWordsToFile(String[] words, String outputFileName) throws FileNotFoundException {
47                      // Equate a print with an output file
48                      PrintWriter printer = getPrintWriter(outputFileName);
49                      // Print the words to the file
50                      for ( int x = words.length-1; x >= 0; x = x - 1 ) {
51                          printer.println(words[x]);
52                      }
53                      printer.close();
54                  }
55   
56                  private static Scanner establishScanner(String inputFileName) throws FileNotFoundException {
57                      String fullFileName = createFullFileName(inputFileName);
58                      return new Scanner(new File(fullFileName));
59                  }
60   
61                  private static PrintWriter getPrintWriter(String outputFileName) throws FileNotFoundException {
62                      String fullFileName = createFullFileName(outputFileName);
63                      PrintWriter printer = new PrintWriter(fullFileName);
64                      return printer;
65                  }
66   
67                  // Create the full file name for a simple file name, assuming that it will be 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      }