1    package arraylists;
2    import java.io.File;
3    import java.io.FileNotFoundException;
4    import java.io.IOException;
5    import java.io.PrintWriter;
6    import java.util.ArrayList;
7    import java.util.Scanner;
8    
9    
10   public class reverseCopy {
11       public static void main(String[] args) throws FileNotFoundException, IOException{
12           String inputFileName = "Ozymandias.text";
13           String outputFileName = "OzymandiasReversed.text";
14           ArrayList<String> words = readWordsFromFile(inputFileName);
15           writeWordsToFile(words, outputFileName);
16       }
17       private static ArrayList<String> readWordsFromFile(String inputFileName)
18               throws FileNotFoundException {
19           //equate scanner with input file
20           Scanner scanner = establishScanner(inputFileName);
21           //read words from file into a dynamically growing arraylist
22           ArrayList<String> words = new ArrayList<>();
23           while (scanner.hasNext()) {
24               String word = scanner.next();
25               words.add(word);
26           }
27           return words;
28       }
29   
30       private static void writeWordsToFile(ArrayList<String> words, String outputFileName)
31               throws IOException {
32           // equate a printer w/ output file
33           PrintWriter printer = getPrintWriter(outputFileName);
34           //print the words to the file
35           for (int x = words.size()-1; x >= 0; x = x -1) {
36               printer.println(words.get(x));
37           }
38           printer.close();
39       }
40       private static Scanner establishScanner(String inputFileName)
41               throws FileNotFoundException{
42           String FullFileName = createFullFileName(inputFileName);
43           return new Scanner(new File(FullFileName));
44   
45   
46       }
47   
48   
49       private static PrintWriter getPrintWriter(String outputFileName)
50               throws FileNotFoundException{
51           String fullFileName = createFullFileName(outputFileName);
52           PrintWriter printer = new PrintWriter(fullFileName);
53           return printer;
54       }
55   //Create the full file name for a simple file name, assuming that it will be
56   // found in the CS1Files/data subdirectory of the user’s home directory.
57       private static String createFullFileName(String fileName) {
58           String separator = System.getProperty("file.separator");
59           String home = System.getProperty("user.home");
60           String path = home + separator + "CS1Files" + separator + "data" + separator;
61           String fullFileName = path + fileName;
62           return fullFileName;
63       }
64   }
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