/* * This program features an ArrayList to do its reverse copy thing * from one file to another. */ package arrayplay; import java.io.File; import java.io.FileNotFoundException; import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayList; import java.util.Scanner; public class ReverseCopy { public static void main(String[] args) throws FileNotFoundException, IOException { String inputFileName = "Centuries.text"; String outputFileName = "CenturiesReversed.text"; String[] words = readWordsFromFile(inputFileName); writeWordsToFile(words, outputFileName); } private static final int Limit = 1000; private static String[] readWordsFromFile(String inputFileName) throws FileNotFoundException { // Equate a scanner with the input file Scanner scanner = establishScanner(inputFileName); // Read the words from the file into a dynamically growing ArrayList String[] temp = new String[Limit]; int index = 0; while (scanner.hasNext()) { String word = scanner.next(); temp[index] = word; index = index + 1; } int wordCount = index; String[] words = new String[wordCount]; for (int x = 0; x < wordCount; x = x + 1){ words[x] = temp[x]; } // Return the words return words; } private static void writeWordsToFile(String[] words, String outputFileName) throws IOException { // Equate a printer with an output file PrintWriter printer = getPrintWriter(outputFileName); // Print the words to the file for (int x = words.length - 1; x >= 0; x = x - 1) { printer.println(words[x]); } printer.close(); } private static Scanner establishScanner(String inputFileName) throws FileNotFoundException { String fullFileName = createFullFileName(inputFileName); return new Scanner(new File(fullFileName)); } private static PrintWriter getPrintWriter (String outputFileName) throws FileNotFoundException { String fullFileName = createFullFileName(outputFileName); PrintWriter printer = new PrintWriter(fullFileName); return printer; } private static String createFullFileName(String fileName) { String separator = System.getProperty("file.separator"); String home = System.getProperty("user.home"); String path = home + separator + "CS1Files" + separator + "data" + separator; String fullFileName = path + fileName; return fullFileName; } }