static void log(String format, Object... args) {

int len = format.length();

int argIndex = 0;

StringBuilder sb = new StringBuilder(len + 20);

Pattern pattern = Pattern.compile("\\{\\}");

Matcher m = pattern.matcher(format);

while (m.find()) {

m.appendReplacement(sb, args[argIndex++].toString());

}

m.appendTail(sb);

System.out.println(sb.toString());

return;

}