ReplaceDemo.java Source code

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Here is the source code for ReplaceDemo.java

Source

/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */
import java.util.regex.*;

/**
 * Quick demo of RE substitution: correct "demon" and other
 * spelling variants to the correct, non-satanic "daemon".
 * @author Ian F. Darwin, http://www.darwinsys.com/
 * @version $Id: ReplaceDemo.java,v 1.5 2004/02/09 03:33:42 ian Exp $
 */
public class ReplaceDemo {
    public static void main(String[] argv) {

        // Make an RE pattern to match almost any form (deamon, demon, etc.).
        String patt = "d[ae]{1,2}mon"; // i.e., 1 or 2 'a' or 'e' any combo

        // A test input.
        String input = "Unix hath demons and deamons in it!";
        System.out.println("Input: " + input);

        // Run it from a RE instance and see that it works
        Pattern r = Pattern.compile(patt);
        Matcher m = r.matcher(input);
        System.out.println("ReplaceAll: " + m.replaceAll("daemon"));

        // Show the appendReplacement method
        m.reset();
        StringBuffer sb = new StringBuffer();
        System.out.print("Append methods: ");
        while (m.find()) {
            m.appendReplacement(sb, "daemon"); // Copy to before first match,
            // plus the word "daemon"
        }
        m.appendTail(sb); // copy remainder
        System.out.println(sb.toString());
    }
}