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.*;
8    import java.util.Scanner;
9    
10   public class ReverseCopy {
11   
12       public static void main(String[] args) throws FileNotFoundException, IOException {
13           String inputFileName = "AllToMyself.text";
14           String outputFileName = "AllToMyselfReversed.text";
15           String[] words = readWordsFromFile(inputFileName);
16           writeWordsToFile(words, outputFileName);
17   
18       }
19   
20       private static final int LIMIT = 1000;
21   
22       private static String[] readWordsFromFile(String inputFileName) throws FileNotFoundException {
23           //Equate a scanner with an input file
24           Scanner scanner = establishScanner(inputFileName);
25           //Read the words from the file into an oversized array
26           String[] temp = new String[LIMIT];
27           int index = 0;
28           while (scanner.hasNext()){
29               String word = scanner.next();
30               temp[index] = word;
31               index = index + 1;
32           }
33   
34           int wordCount = index;
35           //Transfer the words to a perfectly sized array
36           String[] words = new String[wordCount];
37           for ( int x = 0; x < wordCount; x = x + 1){
38               words[x] = temp[x];
39           }
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   
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
68       // found in the CS1Filers/data subdirectory of the user's home directory.
69   
70       private static String createFullFileName(String fileName) {
71           String separator = System.getProperty("file.separator");
72           String home = System.getProperty("user.home");
73           String path = home + separator + "CS1Files" + separator + "data" + separator;
74           String fullFileName = path + fileName;
75           return fullFileName;
76       }
77   
78   }
79