1    package arraylistplay;
2    
3    import java.io.File;
4    import java.io.FileNotFoundException;
5    import java.io.IOException;
6    import java.io.PrintWriter;
7    import java.util.ArrayList;
8    import java.util.Scanner;
9    
10   public class ReverseCopy {
11   
12       public static void main(String[] args) throws FileNotFoundException, IOException {
13           String inputFileName = "SeizeTheDay.text";
14           String outputFileName = "SeizeTheDayReversed.text";
15           ArrayList<String> words = readWordsFromFile(inputFileName);
16           writeWordsToFile(words, outputFileName);
17       }
18   
19       private static ArrayList<String> readWordsFromFile(String inputFileName) throws FileNotFoundException {
20           //Equate a scanner with the input file
21           Scanner scanner = establishScanner(inputFileName);
22           //Read the words from the file into a dynamically growing ArrayList
23           ArrayList<String> words = new ArrayList<>();
24           while (scanner.hasNext()) {
25               String word = scanner.next();
26               words.add(word);
27           }
28           //Return the words
29           return words;
30       }
31   
32       private static void writeWordsToFile(ArrayList<String> words, String outputFileName) throws IOException{
33           //Equate a printer with an output file
34           PrintWriter printer = getPrintWriter(outputFileName);
35           // Print the words to the file
36           for ( int x = words.size() - 1; x >= 0; x = x - 1) {
37               printer.println(words.get(x));
38           }
39           printer.close();
40       }
41   
42       private static Scanner establishScanner(String inputFileName) throws FileNotFoundException {
43           String fullFileName = createFullFileName(inputFileName);
44           return new Scanner(new File(fullFileName));
45       }
46   
47       private static PrintWriter getPrintWriter(String outputFileName) throws FileNotFoundException {
48           String fullFileName = createFullFileName(outputFileName);
49           PrintWriter printer = new PrintWriter(fullFileName);
50           return printer;
51       }
52   
53       //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.
54       private static String createFullFileName(String fileName) {
55           String separator = System.getProperty("file.separator");
56           String home = System.getProperty("user.home");
57           String path = home + separator + "CS1Files" + separator + "data" + separator;
58           String fullFileName = path + fileName;
59           return fullFileName;
60       }
61   }
62