Java Stream - 如何使用隐含返回类型

import java.util.Arrays;

public class Main {
   public static void main(String[] args) {
      Integer[] numbers = {1, 2, 3};

      // watch return types, it is implied, no return keyword is necessary
      Arrays.sort(numbers, (i1, i2) -> i2 - i1);

      System.out.println(Arrays.toString(numbers));
   }

}