java8 stream 操作

來個demo public static void main(String[] args) { List<Integer> list = Arrays.asList(1, 2, 2, 2, 2, 33, 3, 3, 3, 4, 5, 9, 8, 7, 33, 22, 11); //遍歷 list.forEach(a -> System.out.print(a + " "

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