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 ReverseCopy2 {
11       public static void main(String[] args) throws FileNotFoundException, IOException {
12           String inputFileName = "SleepyPuppies.text";
13           String outputFileName = "SleepyPuppiesReversed.text";
14           ArrayList<String> words = readWordsFromFile(inputFileName);
15           writeWordsToFile(words, outputFileName);
16       }
17   
18       private static final int LIMIT = 1000;
19   
20       private static ArrayList<String> readWordsFromFile(String inputFileName)
21               throws FileNotFoundException {
22           //Equate a scanner with the input file
23           Scanner scanner = establishScanner(inputFileName);
24           //Read the words from the file into an over-sized array.
25           ArrayList<String> words = new ArrayList<String>();
26           while (scanner.hasNext()) {
27               String word = scanner.next();
28               words.add(word);
29           }
30           //Return the words
31           return words;
32       }
33   
34       private static void writeWordsToFile(ArrayList<String> words, String outputFileName)
35               throws IOException {
36           //Equate a printer with an output file.
37           PrintWriter printer = getPrinterWriter(outputFileName);
38           //Print the words to the file.
39           for (int x = words.size() - 1; x >= 0; x = x - 1) {
40               printer.println(words.get(x));
41           }
42           printer.close();
43       }
44   
45       private static Scanner establishScanner(String inputFileName)
46               throws FileNotFoundException {
47           String fullFileName = createFullFileName(inputFileName);
48           return new Scanner(new File(fullFileName));
49       }
50   
51       private static PrintWriter getPrinterWriter(String outputFileName) throws FileNotFoundException {
52           String fullFileName = createFullFileName(outputFileName);
53           PrintWriter printer = new PrintWriter(fullFileName);
54           return printer;
55       }
56   
57       private static PrintWriter getPrintWriter(String outputFileName)
58               throws FileNotFoundException {
59           String fullFileName = createFullFileName(outputFileName);
60           PrintWriter printer = new PrintWriter(fullFileName);
61           return printer;
62       }
63           //Create the full file name for a simple file name, assuming that it will be
64           //found in the CS1File/data subdirectory of the user's home directory.
65           private static String createFullFileName (String fileName){
66               String separator = System.getProperty("file.separator");
67               String home = System.getProperty("user.home");
68               String path = home + separator + "CS1Files" + separator + "data" + separator;
69               String fullFileName = path + fileName;
70               return fullFileName;
71   
72           }
73       }
74