Write code to Replace all occurrences of pattern in the specified string with replacement.
//package com.book2s; public class Main { public static void main(String[] argv) { String string = "book2s.com"; String pattern = "o"; String replacement = "O"; System.out.println(substitute(string, pattern, replacement)); }//from ww w. j a v a 2 s. c o m /** Replace all occurrences of <i>pattern</i> in the specified * string with <i>replacement</i>. Note that the pattern is NOT * a regular expression, and that relative to the * String.replaceAll() method in jdk1.4, this method is extremely * slow. This method does not work well with back slashes. * @param string The string to edit. * @param pattern The string to replace. * @param replacement The string to replace it with. * @return A new string with the specified replacements. */ public static String substitute(String string, String pattern, String replacement) { int start = string.indexOf(pattern); while (start != -1) { StringBuffer buffer = new StringBuffer(string); buffer.delete(start, start + pattern.length()); buffer.insert(start, replacement); string = new String(buffer); start = string.indexOf(pattern, start + replacement.length()); } return string; } }