1 /* 2 Program featuring straight up arrays and file IO to read and reverse copy a lyric. 3 */ 4 5 package arrayplay; 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 Lyrics { 13 public static void main(String[] args) throws FileNotFoundException, IOException { 14 String inputFileName = "StandByMe.text"; 15 String outputFileName = "StandByMeReversed.text"; 16 String[] words = readWordsFromFile(inputFileName); 17 writeWordsToFile(words, outputFileName); 18 } 19 20 private static final int LMIT = 1000; 21 22 private static String[] readWordsFromFile(String inputFileName) throws FileNotFoundException { 23 // Equate a scanner with the input file 24 Scanner scanner = establishScanner(inputFileName); 25 // Read the words from the file into an oversized array 26 String[] temp = new String[LMIT]; 27 int index = 0; 28 while (scanner.hasNext()) { 29 String word = scanner.next(); 30 temp[index] = word; 31 index = index + 1; 32 } 33 34 int wordCount = index; 35 // Transfer the words to a perfectly sized array 36 String[] words = new String[wordCount]; 37 for (int x = 0; x < wordCount; x = x + 1) { 38 words[x] = temp[x]; 39 } 40 41 //Return the words 42 return words; 43 } 44 45 private static void writeWordsToFile(String[] words, String outputFileName) throws IOException { 46 //Equate a printer with an output file 47 PrintWriter printer = getPrintWriter(outputFileName); 48 //Print the words to the file 49 for (int x = words.length - 1; x >= 0; x = x - 1) { 50 printer.println(words[x]); 51 } 52 printer.close(); 53 } 54 55 private static Scanner establishScanner(String inputFileName) throws FileNotFoundException { 56 String fullFileName = createFullFileName(inputFileName); 57 return new Scanner(new File(fullFileName)); 58 } 59 60 private static PrintWriter getPrintWriter(String outputFileName) throws FileNotFoundException { 61 String fullFileName = createFullFileName(outputFileName); 62 PrintWriter printer = new PrintWriter(fullFileName); 63 return printer; 64 } 65 //Create the full file name for a simple file name, assuming that it will be 66 //found in the CS1Files/data subdirectory of the user's home directory. 67 68 private static String createFullFileName(String fileName) { 69 String separator = System.getProperty("file.separator"); 70 String home = System.getProperty("user.home"); 71 String path = home + separator + "CS1Files" + separator + "data" + separator; 72 String fullFileName = path + fileName; 73 return fullFileName; 74 75 76 77 78 } 79 } 80 81