matcher 的group

		Pattern p = Pattern.compile("(\\d)([A-C])");
		Matcher m = p.matcher("0A");
		if (m.matches()) {
			System.out.println(m.group(0));// 注意,group(0)总是返回整个匹配字串
			System.out.println(m.group(1)); //0
			System.out.println(m.group(2)); //A
		}