java 按指定字符拆分String并返回List

[1]按指定字符拆分String并返回List

    private static ArrayList<String> split(String str) {
        if (str == null) return null;
        // Use StringTokenizer because it is faster than split.
        StringTokenizer tokenizer = new StringTokenizer(str, ",");
        ArrayList<String> substrings = new ArrayList<String>();
        while (tokenizer.hasMoreElements()) {
            substrings.add(tokenizer.nextToken());
        }
        return substrings;
    }