1    /* 
2    program for writing lyrics in reverse. 
3    */
4    package arrayplay;
5    
6    import java.io.File;
7    import java.io.FileNotFoundException;
8    import java.io.IOException;
9    import java.io.PrintWriter;
10   import java.util.Scanner;
11   
12    public class ReverseCopy {
13       public static void main(String[] args) throws FileNotFoundException, IOException {
14           String inputFileName = "OrdinaryPeople.text";
15           String outputFileName = "OrdinaryPeopleReversed.text";
16           String[] words = readWordsFromFile(inputFileName);
17           writeWordsToFile(words, outputFileName);
18       }
19   
20       private static final int LIMIT = 1000;
21           private static String[] readWordsFromFile(String inputFileName) throws FileNotFoundException {
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 into 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           private static PrintWriter getprintWriter(String outputFileName) throws FileNotFoundException{
58               String fullFileName = createFullFileName(outputFileName);
59               PrintWriter printer = new PrintWriter(fullFileName);
60               return printer;
61           }
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           private static String createFullFileName(String fileName) {
67               String separator = System.getProperty("file.separator");
68               String home = System.getProperty("user.home");
69               String path = home + separator + "CS1Files" + separator + "data" + separator;
70               String fullFileName = path + fileName;
71               return fullFileName;
72           }
73   
74    }
75