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 = "MtStHelen.text";
17           String outputFileName = "MtStHelenReversed.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   
36           int wordCount = index;
37           //Transfer the words to a perfectly sized array
38           String[] words = new String[wordCount];
39           for (int x = 0; x<wordCount; x=x+1){
40               words[x] = temp[x];
41           }
42           //Return the words
43           return words;
44       }
45   
46       private static void writeWordsToFile(String[] words, String outputFileName) throws IOException{
47           //Equate a printer with an output file
48           PrintWriter printer = getPrintWriter(outputFileName);
49           //Print the words to the file
50           for (int x = words.length-1; x>=0;x=x-1){
51               printer.println(words[x]);
52           }
53           printer.close();
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 found in the CS1Files/data subdirectory of the user's home directory
68       private static String createFullFileName(String fileName) {
69           String separator = System.getProperty("file.separator");
70           String home = System.getProperty("user.home");
71           String path =home+separator+"CS1Files"+separator+"data"+separator;
72           String fullFileName=path+fileName;
73           return fullFileName;
74       }
75   }
76