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.File;
8    import java.io.FileNotFoundException;
9    import java.io.IOException;
10   import java.io.PrintWriter;
11   import java.util.Scanner;
12   
13   public class ReverseCopy {
14   
15       public static void main(String[] args) throws FileNotFoundException, IOException{
16           String inputFileName = "first.text";
17           String outputFileName = "firstReversed.text";
18           String[] words = readWordsFromFile(inputFileName);
19           writeWordsToFile(words, outputFileName);
20       }
21   
22       private static final int LIMIT = 1000;
23   
24       private static String[] readWordsFromFile(String inputFileName) throws FileNotFoundException {
25           //Equate a scanner with the input file
26           Scanner scanner = establishScanner(inputFileName);
27           //Read the words from the file into an oversized array
28           String[] temp = new String[LIMIT];
29           int index = 0;
30           while (scanner.hasNext()){
31               String word = scanner.next();
32               temp[index] = word;
33               index = index + 1;
34           }
35           int wordCount = index;
36           //Transfer the words to a perfectly sized array
37           String[] words = new String[wordCount];
38           for ( int x = 0; x < wordCount; x = x + 1) {
39               words[x] = temp[x];
40           }
41           //Return the words
42           return words;
43       }
44   
45       private static Scanner establishScanner(String inputFileName) throws FileNotFoundException {
46           String fullFileName = createFullFileName(inputFileName);
47           return new Scanner(new File(fullFileName));
48       }
49   
50       private static PrintWriter getPrintWriter(String outputFileName) throws FileNotFoundException{
51           String fullFileName = createFullFileName(outputFileName);
52           PrintWriter printer = new PrintWriter(fullFileName);
53           return printer;
54       }
55   
56       //Create the full file name for a simple file name, assuming that it will be
57       //fouond in the CS1Files/data subdirectory of the user's home directory
58       private static String createFullFileName(String fileName){
59           String separator = System.getProperty("file.separator");
60           String home = System.getProperty("user.home");
61           String path = home + separator + "CS1Files" + separator + "data" + separator;
62           String fullFileName = path + fileName;
63           return fullFileName;
64       }
65   
66       private static void writeWordsToFile(String[] words, String outputFileName) throws IOException{
67           //Equate a printer with an output file
68           PrintWriter printer = getPrintWriter(outputFileName);
69           //Print the words to the file
70           for ( int x = words.length-1; x >= 0; x = x - 1){
71               printer.println(words[x]);
72           }
73           printer.close();
74       }
75   }
76