1 /*
 2  * Program featuring ArrayLists and file IO to read and reverse copy 
 3  * a lyric.
 4  */
 5 
 6 package arraylistplay;
 7 
 8 import java.io.File;
 9 import java.io.FileNotFoundException;
10 import java.io.IOException;
11 import java.io.PrintWriter;
12 import java.util.ArrayList;
13 import java.util.Scanner;
14 
15 /**
16  *
17  * @author kchan2
18  */
19 public class ReverseCopy {
20 
21     /**
22      * @param args the command line arguments
23      */
24     public static void main(String[] args) throws FileNotFoundException, IOException {
25         String inputFileName = "SleepingBeauty.text";
26         String outputFileName = "SleepingBeautyReversed.text";
27         ArrayList<String> words = readWordsFromFile(inputFileName);
28         writeWordstoFile(words,outputFileName);
29     }
30 
31     private static ArrayList<String> readWordsFromFile(String inputFileName) throws FileNotFoundException {
32         //Equate a scanner with the input file
33         Scanner scanner = establishScanner(inputFileName);
34         //Read the words from the file into a dynamically growing ArrayList
35         ArrayList<String> words = new ArrayList<>();
36         while ( scanner.hasNext() ) {
37             String word = scanner.next();
38             words.add(word);
39         }
40         //Return the words
41         return words;
42     }
43 
44     private static void writeWordstoFile(ArrayList<String> words, String outputFileName) throws IOException {
45         //Equate a printer with an output file
46         PrintWriter printer = getPrintWriter(outputFileName);
47         //Print the words to the file
48         for ( int x = words.size()-1; x >= 0; x = x - 1) {
49             printer.println(words.get(x));
50         }
51         printer.close();
52     }
53 
54     private static Scanner establishScanner(String inputFileName) throws FileNotFoundException {
55         String fullFileName = createFullFileName(inputFileName);
56         return new Scanner(new File(fullFileName));
57     }
58 
59     private static PrintWriter getPrintWriter(String outputFileName) throws FileNotFoundException {
60         String fullFileName = createFullFileName(outputFileName);
61         PrintWriter printer = new PrintWriter(fullFileName);
62         return printer;
63     }
64     
65     //Create the full file name for a simple file name, assuming that it will be
66     //found in the CS1Files/data subdirectory of the user's home directory.
67 
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 }
77