1 /* 2 Program featuring straight up arrays and fine IO to read and reverse copy a lyric. 3 */ 4 5 package arrayplay; 6 7 import java.io.File; 8 import java.io.FileNotFoundException; 9 import java.io.IOException; 10 import java.io.PrintWriter; 11 import java.util.Scanner; 12 13 public class ReverseCopy { 14 15 public static void main(String[] args) throws FileNotFoundException, IOException { 16 String inputFileName = "MaybeIDK.text"; 17 String outputFileName = "MaybeIDKReversed.text"; 18 String[] words = readWordsFromFile(inputFileName); 19 writeWordsToFile(words,outputFileName); 20 } 21 22 private static final int LIMIT = 1000; 23 24 private static String[] readWordsFromFile(String inputFileName) throws FileNotFoundException { 25 //Equate a scanner with the input file 26 Scanner scanner = establishScanner(inputFileName); 27 //Read the words from the file into an oversized array 28 String[] temp = new String[LIMIT]; 29 int index=0; 30 while (scanner.hasNext()) { 31 String word = scanner.next(); 32 temp[index]=word; 33 index=index+1; 34 } 35 int wordCount = index; 36 //Transfer the words to a perfectly sized array 37 String[] words = new String[wordCount]; 38 for (int x=0; x<wordCount;x=x+1){ 39 words[x]=temp[x]; 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 public static PrintWriter getPrintWriter(String outputFileName) throws FileNotFoundException { 60 String fullFileName = createFullFileName(outputFileName); 61 PrintWriter printer = new PrintWriter(fullFileName); 62 return printer; 63 } 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 homke 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