求一个正则！！急！！
br['35']='266,A 111,B 222'

我需要匹配出35，正则该怎么写啊

------解决方案--------------------
String str = "br['35']='266,A 111,B 222'";
Pattern pattern = Pattern.compile("br\\['(\\d*)'\\]");
Matcher matcher = pattern.matcher(str);
while (matcher.find()) {
System.out.println(matcher.group(1));
}