Java String Whitespace Collapse collapseWhitespace(String in, char replacementChar)

Description

collapse Whitespace

License

Apache License

Declaration

public static String collapseWhitespace(String in, char replacementChar) 

Method Source Code

//package com.java2s;
/*//from  w ww.j  a v  a 2s  .c  o  m
 *
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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 {
    public static String collapseWhitespace(String in, char replacementChar) {
        StringBuilder sb = new StringBuilder();
        int size = in.length();
        boolean lastWasSpace = true;
        int i = 0;
        while (i < size) {
            char c = in.charAt(i++);
            boolean ws = Character.isWhitespace(c);
            if (ws) {
                if (lastWasSpace)
                    ; // consume the character
                else
                    sb.append(replacementChar);
                lastWasSpace = true;
            } else {
                sb.append(c);
                lastWasSpace = false;
            }
        }
        return sb.toString().trim();
    }
}

Related

1. collapseSpaces(String s)
2. collapseSpaces(String text, char[] spaceCharacters)
3. collapseWhiteSpace(CharSequence value)
4. collapseWhiteSpace(final String s)
5. collapseWhiteSpace(String content)
6. collapseWhitespace(String s)
7. collapseWhitespace(String s, boolean trim)
8. collapseWhitespace(String str)
9. collapseWhitespace(String string)