Java Stream How to - Use type inferences to avoid the need to define Integer

Question

We would like to know how to use type inferences to avoid the need to define Integer.

Answer

import java.util.Arrays;
/*ww w  . j  a v a  2  s  . co  m*/
public class Main {
   public static void main(String[] args) {
      Integer[] numbers = {1, 2, 3};

      Arrays.sort(numbers, (i1, i2) -> { return (i2 - i1); });

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

}

The code above generates the following result.