private static void replace(String source, String pattern, String replace, StringBuffer builder) { int pos = 0; int pl = pattern.length(); builder.delete(0, builder.length()); while (pos < source.length()) { int np = source.indexOf(pattern, pos); if (np == -1) break; builder.append(source.substring(pos, np)); builder.append(replace); pos = np + pl; } builder.append(source.substring(pos)); }