Mega Code Archive
Trims several consecutive characters into one
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/*
* 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.
*
*/
/**
* Various string manipulation methods that are more efficient then chaining
* string operations: all is done in the same buffer without creating a bunch of
* string objects.
*
* @author <a href="mailto:dev@labs.apache.org">Dungeon Project</a>
*/
public class Main {
/**
* Trims several consecutive characters into one.
*
* @param str
* the string to trim consecutive characters of
* @param ch
* the character to trim down
* @return the newly trimmed down string
*/
public static final String trimConsecutiveToOne( String str, char ch )
{
if ( ( null == str ) || ( str.length() == 0 ) )
{
return "";
}
char[] buffer = str.toCharArray();
char[] newbuf = new char[buffer.length];
int pos = 0;
boolean same = false;
for ( int i = 0; i < buffer.length; i++ )
{
char car = buffer[i];
if ( car == ch )
{
if ( same )
{
continue;
}
else
{
same = true;
newbuf[pos++] = car;
}
}
else
{
same = false;
newbuf[pos++] = car;
}
}
return new String( newbuf, 0, pos );
}
}
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