Java Stream How to - Reverse Integer array








Question

We would like to know how to reverse Integer array.

Answer

import java.util.Arrays;
/*from w w w  . j a v a2 s.  co  m*/
public class Main {
   public static void main(String[] args) {
      Integer[] numbers = {1, 2, 3};

      // reverse with lambda
      reverseWithLambda(numbers);
      System.out.println(Arrays.toString(numbers));
   }

   private static void reverseWithLambda(Integer[] numbers) {
      Arrays.sort(numbers, (Integer i1, Integer i2) -> { return (i2 - i1); });
   }

}

The code above generates the following result.