Java逗号分隔转换成数组

方法一：
String input = "apple,banana,orange";
String[] array = input.split(",");

方法二：
String input = "apple,banana,orange";
List<String> list = Arrays.asList(input.split(","));
String[] array = new String[list.size()];
array = list.toArray(array);

方法三：
String input = "apple,banana,orange";
StringTokenizer tokenizer = new StringTokenizer(input, ",");
String[] array = new String[tokenizer.countTokens()];
int index = 0;
while (tokenizer.hasMoreTokens()) {
    array[index] = tokenizer.nextToken();
    index++;