Java String Substritute substitute(String str, String from, String to)

Description

substitute

License

Apache License

Declaration

public static String substitute(String str, String from, String to) 

Method Source Code

//package com.java2s;
/*/*from w w  w  .j  a  v  a 2 s .  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 substitute(String str, String from, String to) {
        if (from == null || from.equals("") || to == null)
            return str;

        int index = str.indexOf(from);

        if (index == -1)
            return str;

        StringBuilder buf = new StringBuilder(str.length());
        int lastIndex = 0;

        while (index != -1) {
            buf.append(str.substring(lastIndex, index));
            buf.append(to);
            lastIndex = index + from.length();
            index = str.indexOf(from, lastIndex);
        }

        // add in last chunk
        buf.append(str.substring(lastIndex));

        return buf.toString();
    }
}

Related

1. substitute(final String input, final String pattern, final String sub)
2. substitute(String in, String find, String newString)
3. substitute(String original, String match, String subst)
4. substitute(String s, String from, String to)
5. substitute(String str, CharSequence... substitutionSeqs)
6. substitute(String str, String source, String target)
7. substitute(String str, String source, String target)
8. substitute(String str, String variable, String value, int num)
9. substitute(String string, String pattern, String replacement)