Java String Whitespace Collapse collapseWhiteSpace(String text)

Description

collapse White Space

License

Open Source License

Declaration

public static String collapseWhiteSpace(String text) 

Method Source Code

//package com.java2s;
/*// w ww .  j  av  a2s  . c  o m
 *  PHEX - The pure-java Gnutella-servent.
 *  Copyright (C) 2001 - 2006 Phex Development Group
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 *  Created on 23.11.2005
 *  --- CVS Information ---
 *  $Id: ParserUtils.java 3362 2006-03-30 22:27:26Z gregork $
 */

public class Main {
    public static String collapseWhiteSpace(String text) {
        int len = text.length();
        int s;
        for (s = 0; s < len; s++)
            if (isWhiteSpace(text.charAt(s)))
                break;

        if (s == len)
            return text;
        StringBuffer result = new StringBuffer(len);
        if (s != 0) {
            for (int i = 0; i < s; i++)
                result.append(text.charAt(i));

            result.append(' ');
        }
        boolean inStripMode = true;
        for (int i = s + 1; i < len; i++) {
            char ch = text.charAt(i);
            boolean b = isWhiteSpace(ch);
            if (!inStripMode || !b) {
                inStripMode = b;
                if (inStripMode)
                    result.append(' ');
                else
                    result.append(ch);
            }
        }

        len = result.length();
        if (len > 0 && result.charAt(len - 1) == ' ')
            result.setLength(len - 1);
        return result.toString();
    }

    private static final boolean isWhiteSpace(char ch) {
        if (ch > ' ')
            return false;
        else
            return ch == '\t' || ch == '\n' || ch == '\r' || ch == ' ';
    }
}

Related

1. collapseWhitespace(String s, boolean trim)
2. collapseWhitespace(String str)
3. collapseWhitespace(String string)
4. collapseWhiteSpace(String string)
5. collapseWhitespace(String text)
6. collapseWhiteSpace(StringBuffer oriText)
7. collapseWhiteSpaces(String str)