1    /* 
2    * A 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       public static void main(String[] args) throws FileNotFoundException, IOException{
15           String inputFileName = "haveEachOther.txt";
16           String outputFileName = "haveEachOtherReversed.txt";
17           String[] words = readWordsFromFile(inputFileName);
18           writeWordsToFile(words,outputFileName);
19       }
20   
21       private static final int LIMIT = 1000;
22   
23       private static String[] readWordsFromFile(String inputFileName) throws FileNotFoundException{
24           //Equate a scanner with the input file
25           Scanner scanner = establishScanner(inputFileName);
26           //Read the words from the file into an oversized array
27           String[] temp = new String[LIMIT];
28           int index = 0;
29           while (scanner.hasNext()){
30               String word = scanner.next();
31               temp[index] = word;
32               index = index + 1;
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           //Return the words
41           return words;
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       private static Scanner establishScanner(String inputFileName) throws FileNotFoundException{
53           String fullFileName = createFullFileName(inputFileName);
54           return new Scanner(new File(fullFileName));
55       }
56       private static PrintWriter getPrintWriter(String outputFileName) throws FileNotFoundException{
57           String fullFileName = createFullFileName(outputFileName);
58           PrintWriter printer = new PrintWriter(fullFileName);
59           return printer;
60       }
61       //Create the full file name for a simple file name, assuming that it will be
62       //found in the CS1Files/data subdirectory of the user's home directory
63       private static String createFullFileName(String fileName){
64           String separator = System.getProperty("file.separator");
65           String home = System.getProperty("user.home");
66           String path = home + separator +"Desktop" + separator + "public_html" + separator + "CS1WorkSite" + separator + "data" + separator;
67           String fullFileName = path + fileName;
68           return fullFileName;
69       }
70   }
71