1    /* 
2     * Program featuring straight up arrays and file IO to read and reverse copy a lyric. 
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 = "airForce.txt";
15           String outputFileName = "airForceReversed.txt";
16           String[] words = readWordsFromFile(inputFileName);
17           writeWordsToFile(words,outputFileName);
18   
19       }
20   
21       private static final int LIMIT = 1000;
22   
23   
24       private static void writeWordsToFile(String[] words, String outputFileName) throws IOException {
25           //equate a printer with an output file
26           PrintWriter printer = getPrintWriter(outputFileName);
27           //print words to file
28           for (int x = words.length - 1; x>=0; x=x-1){
29               printer.println(words[x]);
30           }
31           printer.close();
32   
33       }
34   
35       private static PrintWriter getPrintWriter(String outputFileName) throws FileNotFoundException{
36           String fullFileName = createFullFileName(outputFileName);
37           PrintWriter printer = new PrintWriter(fullFileName);
38           return printer;
39       }
40   
41       private static String[] readWordsFromFile(String inputFileName) throws FileNotFoundException {
42           //equate a scanner with the input file
43           Scanner scanner = establishScanner(inputFileName);
44           //read the words from the file into an oversized array
45           String[] temp = new String[LIMIT];
46           int index = 0;
47           while (scanner.hasNext()) {
48               String word = scanner.next();
49               temp[index] = word;
50               index = index +1;
51           }
52           int wordCount = index;
53           //transfer the words to a perfectly sized array
54           String[] words = new String[wordCount];
55           for(int x=0; x<wordCount; x=x+1) {
56               words[x] = temp[x];
57           }
58           return words;
59   
60       }
61   
62       private static Scanner establishScanner(String inputFileName) throws FileNotFoundException {
63           String fullFileName = createFullFileName(inputFileName);
64           return new Scanner(new File(fullFileName));
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 +"Documents" + separator + "public_html" + separator + "CS1WorkSite" + separator + "data" +separator;
71           String fullFileName = path + fileName;
72           return fullFileName;
73   
74       }
75   }
76