如何把一段逗号分割的字符串转换成一个数组？

方法一：

    public static void main(String[] args) {
        String str = "abc,de,f,ghij,klmnopq";
        String[] result = str.split(",");
        for (int i = 0; i < result.length; i++) {
            System.out.println(result[i]);
        }
    }

结果为：

abc
de
f
ghij
klmnopq

方法二：

        String str = "abc,de,f,ghij,klmnopq";
        StringTokenizer tokener = new StringTokenizer(str, ",");
        String[] result = new String[tokener.countTokens()];
        int i = 0;
        while (tokener.hasMoreElements()) {
            result[i++] = tokener.nextToken();
        }
        for (int j = 0; j < result.length; j++) {
            System.out.println(result[j]);
        }

输出结果为：

abc
de
f
ghij
klmnopq