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.io.PrintWriter;
8    import java.util.ArrayList;
9    import java.util.Scanner;
10   
11   public class ReverseCopy {
12   
13       public static void main(String[] args) throws FileNotFoundException, IOException {
14           String inputFileName = "Outside.text";
15           String outputFileName = "OutsideReversed.text";
16           ArrayList<String> words = readWordsFromFile(inputFileName);
17           writeWordsToFile(words, outputFileName);
18       }
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 a dynamically growing ArrayList
25           ArrayList<String> words = new ArrayList<>();
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 = getPrintWriter(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) throws FileNotFoundException{
46           String fullFileName = createFullFileName(inputFileName);
47           return new Scanner(new File(fullFileName));
48       }
49   
50       private static PrintWriter getPrintWriter(String outputFileName) throws FileNotFoundException {
51           String fullFileName = createFullFileName(outputFileName);
52           PrintWriter printer = new PrintWriter(fullFileName);
53           return printer;
54       }
55   
56       //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
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   }
65   
66   
67   
68