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.ArrayList;
11   import java.util.Scanner;
12   
13   public class ReverseCopy {
14       public static void main(String[] args) throws FileNotFoundException, IOException {
15           String inputFileName = "500Miles.txt";
16           String outputFileName = "500MilesReversed.txt";
17           String[] words = readWordsFromFile(inputFileName);
18           writeWordsToFile(words, outputFileName);
19       }
20           private static final int LIMIT = 1000;
21   
22           private static String[] readWordsFromFile (String inputFileName) throws FileNotFoundException {
23               //Equate a scanner with the input file
24               Scanner scanner = establishScanner(inputFileName);
25               // Read the words from the file intoan 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               int wordCount = index;
34               //Transfer the words to a perfectly sized array
35               String[] words = new String[wordCount];
36               for (int x = 0; x < wordCount; x = x + 1) {
37                   words[x] = temp[x];
38               }
39               //RETURN THE WORDS
40               return words;
41           }
42   
43           private static void writeWordsToFile (String[]words, String outputFileName) throws IOException {
44               //EQUATE A PRINTER WITH AN OUTPUT FILE
45               PrintWriter printer = getPrintWriter(outputFileName);
46               //PRINT THE WORDS TO THE FILE
47               for (int x = words.length - 1; x >= 0; x = x - 1) {
48                   printer.println(words[x]);
49               }
50               printer.close();
51           }
52   
53           private static Scanner establishScanner (String inputFileName) throws FileNotFoundException {
54               String fullFileName = createFullFileName(inputFileName);
55               return new Scanner(new File(fullFileName));
56           }
57   
58           private static PrintWriter getPrintWriter (String outputFileName) throws FileNotFoundException {
59               String fullFileName = createFullFileName(outputFileName);
60               PrintWriter printer = new PrintWriter(fullFileName);
61               return printer;
62           }
63   
64           //CREATE THE FULL FILE NAME FOR A SIMPLE FILE NAME, ASSUMING THAT IT WILL BE FOUND IN THE CS1FILES/DATA
65           // SUBDIRECTORY OF THE USER'S HOME DIRECTORY
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 + "CS1Files" + separator + "data" + separator;
71               String fullFileName = path + fileName;
72               return fullFileName;
73           }
74       }
75   
76   
77