brace.java

	static void brace() {
		String regex = "((?=\\[.+\\])\\[?[a-z]+\\]?)";
		Pattern p = Pattern.compile(regex);
		String[] datas = { "[aaaa]", "[aaaa", "aaaa]", "aaaa" };
		for (String s : datas) {
			System.out.println(s);
			System.out.println(p.matcher(s).matches());
			System.out.println("********");
		}
	}