Java String Whitespace Collapse collapseWhiteSpace(StringBuffer oriText)

Description

collapse multi-whitespace into one whitespace in the original text.

License

Apache License

Parameter

Parameter	Description
oriText	a parameter

Declaration

public static String collapseWhiteSpace(StringBuffer oriText) 

Method Source Code

//package com.java2s;
/**/*from ww  w . j  a v a 2 s.  c om*/
 *  Copyright 2009 Welocalize, Inc. 
 *  
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  
 *  You may obtain a copy of the License at 
 *  http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *  
 */

public class Main {
    /**
     * collapse multi-whitespace into one whitespace in the original text.
     * Support unicode white space with isWhitespace and isSpaceChar method in
     * {@link #Character}
     * 
     * @param oriText
     * @return
     */
    public static String collapseWhiteSpace(StringBuffer oriText) {
        if (oriText == null) {
            return null;
        }

        int oriLen = oriText.length();
        StringBuffer newText = new StringBuffer(oriLen);
        int wsCount = 0;
        char lastWs = ' ';

        for (int i = 0; i <= oriLen; i++) {
            if (i == oriLen) {
                if (wsCount == 1) {
                    newText.append(lastWs);
                }

                if (wsCount > 1) {
                    newText.append(' ');
                }

                wsCount = 0;
                break;
            }

            char c = oriText.charAt(i);
            if (Character.isWhitespace(c) || Character.isSpaceChar(c)) {
                wsCount++;
                lastWs = c;
            } else {
                if (wsCount == 1) {
                    newText.append(lastWs);
                }

                if (wsCount > 1) {
                    newText.append(' ');
                }

                wsCount = 0;

                newText.append(c);
            }
        }

        String relt = newText.toString();
        return relt;
    }
}

Related

1. collapseWhitespace(String str)
2. collapseWhitespace(String string)
3. collapseWhiteSpace(String string)
4. collapseWhiteSpace(String text)
5. collapseWhitespace(String text)
6. collapseWhiteSpaces(String str)