package arrayplay; /* * Program featuring straight up arrays and file IO to read and reverse copy a lyric. */ import java.io.File; import java.io.FileNotFoundException; import java.io.IOException; import java.io.PrintWriter; import java.util.Scanner; public class ReverseCopy { public static void main(String[]args) throws FileNotFoundException, IOException { String inputFileName = "SoberUp.text"; String outputFileName = "SoberUpReversed.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 an oversized array String[] temp = new String[LIMIT]; int index = 0; while(scanner.hasNext()){ String word = scanner.next(); temp[index] = word; index = index + 1; } int wordCount = index; //Transfer the words to a perfectly sized array String[]words = new String[wordCount]; for(int x = 0; x < wordCount; x = x + 1){ words[x] = temp[x]; } //return words return words; } private static void writeWordsToFile(String[] words, String outputFileName) throws FileNotFoundException { //Equate a printer with an output file PrintWriter printer = getPrintWriter(outputFileName); //print 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; } // Create the full file name for a simple file name, assuming that it is found //in the CS1Files/data subdirectory of the user's home directory. 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; } }