Converts a file of English text into Pig Latin.

Stuffy.java

import java.util.*;
import java.io.*;

/*
 * Converts a file of English text into Pig Latin.
 * @author Ando Roots 2011
 */
public class Stuffy {

	/*
	 * Main controller, asks for a file and calls other methods.
	 */
	public static void main(String[] args) {
		TextIO.put("Enter the path for the file (example: /home/john/file.txt): ");
		String file = TextIO.getlnString();
		String translation = translateIntoPigLatin(readFile(file));
		TextIO.put(translation);
		writeFile(translation, "PigLatinOutput.txt");
		TextIO.put("nThe translation has been saved to the current directory as PigLatinOutput.txt");

	}

	/*
	 * Read a textfile and return it's contents
	 * http://www.kodejava.org/examples/28.html
	 */
	private static String readFile(String filename) {
		File file = new File(filename);
		StringBuffer contents = new StringBuffer();
		BufferedReader reader = null;
		try {
			reader = new BufferedReader(new FileReader(file));
			String text = null;

			while ((text = reader.readLine()) != null) {
				contents.append(text).append(
						System.getProperty("line.separator"));
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				if (reader != null) {
					reader.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return contents.toString();
	}

	/*
	 * Write a string to file
	 * http://www.roseindia.net/java/beginners/WriteTextFileExample.shtml
	 */
	 public static void writeFile(String input, String filename){
		 try {Writer output = null;
		    File file = new File(filename);
		    output = new BufferedWriter(new FileWriter(file));
		    output.write(input);
		    output.close();
		 } catch (IOException e) {
			 TextIO.put("I/O error");
		 }
		    }

	/*
	 * Takes a string of English text as a input and returns it as Pig Latin
	 *
	 * @param input A string of English text
	 *
	 * @return String Pig Latin
	 */
	private static String translateIntoPigLatin(String input) {
		String output = "";

		// Break the long string into words (spaces as seperators)
		StringTokenizer st = new StringTokenizer(input);

		// Iterate over every word
		while (st.hasMoreTokens()) {
			output += translateWord(st.nextToken()) + " ";
		}
		return output;
	}

	/*
	 * Translates a single word into Pig Latin
	 *
	 * @param word A String to be translated
	 *
	 * @return A Pig Latin string
	 */
	private static String translateWord(String word) {

		// Check to see if the first letter is a vowel or a consonant
		if (isVowel(word.substring(0, 1))) {
			word = word + "-ay";
		} else {
			// If it's a word beginning with a consonant we need to know the
			// position of the first vowel.
			int vowel_position = 0;
			for (int i = 0; i < word.length(); i++) {
				String letter = word.substring(i, i + 1);

				if (isVowel(letter)) {
					vowel_position = i;
					break;
				}
			}		

			// Do the actual conversion to PL
			if (vowel_position != word.length()) {
			word = word.substring(vowel_position, word.length()) + "-"
					+ word.substring(0, vowel_position) + "ay";
			}
			// If the word begins with a consonant and contains no vowels?
		}
		// Leave only alphanumeric since the program can't handle anything else
		word = word.replaceAll("[^a-zA-Z0-9]", "");
		return word;
	}

	/*
	 * Check if a character is a vowel
	 */
	private static boolean isVowel(String input) {
		String vowels[] = { "a", "e", "i", "o", "u" };
		if (Arrays.asList(vowels).contains(input.toLowerCase())) {
			return true;
		} else {
			return false;
		}
	}
}