RhymingWords.java Source code

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Here is the source code for RhymingWords.java

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/* From http://java.sun.com/docs/books/tutorial/index.html */
/*
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 *
 * -Redistribution in binary form must reproduce the above copyright notice,
 *  this list of conditions and the following disclaimer in the documentation
 *  and/or other materials provided with the distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 */

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.PipedReader;
import java.io.PipedWriter;
import java.io.PrintWriter;
import java.io.Reader;

public class RhymingWords {
    public static void main(String[] args) throws IOException {

        FileReader words = new FileReader("words.txt");

        // do the reversing and sorting
        Reader rhymedWords = reverse(sort(reverse(words)));

        // write new list to standard out
        BufferedReader in = new BufferedReader(rhymedWords);
        String input;

        while ((input = in.readLine()) != null)
            System.out.println(input);
        in.close();
    }

    public static Reader reverse(Reader source) throws IOException {

        BufferedReader in = new BufferedReader(source);

        PipedWriter pipeOut = new PipedWriter();
        PipedReader pipeIn = new PipedReader(pipeOut);
        PrintWriter out = new PrintWriter(pipeOut);

        new ReverseThread(out, in).start();

        return pipeIn;
    }

    public static Reader sort(Reader source) throws IOException {

        BufferedReader in = new BufferedReader(source);

        PipedWriter pipeOut = new PipedWriter();
        PipedReader pipeIn = new PipedReader(pipeOut);
        PrintWriter out = new PrintWriter(pipeOut);

        new SortThread(out, in).start();

        return pipeIn;
    }
}

class SortThread extends Thread {
    private PrintWriter out = null;

    private BufferedReader in = null;

    public SortThread(PrintWriter out, BufferedReader in) {
        this.out = out;
        this.in = in;
    }

    public void run() {
        int MAXWORDS = 50;

        if (out != null && in != null) {
            try {
                String[] listOfWords = new String[MAXWORDS];
                int numwords = 0;

                while ((listOfWords[numwords] = in.readLine()) != null)
                    numwords++;
                quicksort(listOfWords, 0, numwords - 1);
                for (int i = 0; i < numwords; i++)
                    out.println(listOfWords[i]);
                out.close();
            } catch (IOException e) {
                System.err.println("SortThread run: " + e);
            }
        }
    }

    private static void quicksort(String[] a, int lo0, int hi0) {
        int lo = lo0;
        int hi = hi0;

        if (lo >= hi)
            return;

        String mid = a[(lo + hi) / 2];
        while (lo < hi) {
            while (lo < hi && a[lo].compareTo(mid) < 0)
                lo++;
            while (lo < hi && a[hi].compareTo(mid) > 0)
                hi--;
            if (lo < hi) {
                String T = a[lo];
                a[lo] = a[hi];
                a[hi] = T;
                lo++;
                hi--;
            }
        }
        if (hi < lo) {
            int T = hi;
            hi = lo;
            lo = T;
        }
        quicksort(a, lo0, lo);
        quicksort(a, lo == lo0 ? lo + 1 : lo, hi0);
    }
}

class ReverseThread extends Thread {
    private PrintWriter out = null;

    private BufferedReader in = null;

    public ReverseThread(PrintWriter out, BufferedReader in) {
        this.out = out;
        this.in = in;
    }

    public void run() {
        if (out != null && in != null) {
            try {
                String input;
                while ((input = in.readLine()) != null) {
                    out.println(reverseIt(input));
                    out.flush();
                }
                out.close();
            } catch (IOException e) {
                System.err.println("ReverseThread run: " + e);
            }
        }
    }

    private String reverseIt(String source) {
        int i, len = source.length();
        StringBuffer dest = new StringBuffer(len);

        for (i = (len - 1); i >= 0; i--)
            dest.append(source.charAt(i));
        return dest.toString();
    }
}

//word.txt
/*
anatomy
animation
applet
application
argument
bolts
class
communicate
component
container
development
environment
exception
graphics
image
input
integrate
interface
Java
language
native
network
nuts
object
output
primer
program
security
stream
string
threads
tools
user
    
    
*/