1    /* 
2     *Program featuring straight up arrays and file IO to read and reverse copy a 
3     */
4    package arrayplay;
5    
6    import java.io.File;
7    import java.io.FileNotFoundException;
8    import java.io.IOException;
9    import java.io.PrintWriter;
10   import java.util.Scanner;
11   
12   public class ReverseCopy1 {
13       public static void main(String [] args) throws IOException {
14           String inputFileName = "In another life.text";
15           String outputFileName = "In another life reversed.text";
16           String[] words = readWordsFromFile(inputFileName);
17           writeWordsToFile(words,outputFileName);
18       }
19       private static final int LIMIT = 1000;
20   
21       private static String[] readWordsFromFile(String inputFileName) throws FileNotFoundException {
22           //Equate a scanner with the input file
23           Scanner scanner = establishScanner(inputFileName);
24           //Read the words from the file into and oversized array
25           String[] temp = new String[LIMIT];
26           int index = 0;
27           while (scanner.hasNext()){
28               String word = scanner.next();
29               temp[index] = word;
30               index = index + 1;
31           }
32           int wordCount = index;
33           //Transfer the words to a perfectly sized array
34           String[] words=new String[wordCount];
35           for (int x = 0; x<wordCount; x = x + 1){
36               words[x] = temp[x];
37           }
38           //Return the words;
39           return words;
40       }
41   
42       private static void writeWordsToFile(String[] words,String outputFileName) throws IOException{
43           //Equate a printer with and output file
44           PrintWriter printer = getPrintWriter(outputFileName);
45           //Print the words to the file
46           for ( int x = words.length-1;x >= 0;x = x - 1){
47               printer.println(words[x]);
48           }
49           printer.close();
50       }
51   
52       private static Scanner establishScanner(String inputFileName) throws FileNotFoundException{
53           String fullFileName = createFullFileName(inputFileName);
54           return new Scanner(new File(fullFileName));
55       }
56       private static PrintWriter getPrintWriter(String outputFileName) throws FileNotFoundException{
57           String fullFileName = createFullFileName(outputFileName);
58           PrintWriter printer = new PrintWriter(fullFileName);
59           return printer;
60       }
61   
62       //Create the full file name a simple file name, assuming that it will be
63       //found in the CS1Files/data subdirectory of the user's home directory
64   
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