Replace substrings within string : String replace « Data Type « Java
Replace substrings within string
//
// Copyright 2004-2005 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// 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.
//
//
/** Fast String Utilities.
*
* These string utilities provide both conveniance methods and
* performance improvements over most standard library versions. The
* main aim of the optimizations is to avoid object creation unless
* absolutely required.
*
* @author Greg Wilkins (gregw)
*/
class StringUtil
{
/**
* replace substrings within string.
*/
public static String replace(String s, String sub, String with)
{
int c=0;
int i=s.indexOf(sub,c);
if (i == -1)
return s;
StringBuffer buf = new StringBuffer(s.length()+with.length());
synchronized(buf)
{
do
{
buf.append(s.substring(c,i));
buf.append(with);
c=i+sub.length();
} while ((i=s.indexOf(sub,c))!=-1);
if (c<s.length())
buf.append(s.substring(c,s.length()));
return buf.toString();
}
}
}
