Was ist ein Variablenhandle in Java 9?

<strong>public abstract class VarHandle extends Object</strong>

import java.lang.invoke.MethodHandles;
import java.lang.invoke.VarHandle;
import java.util.Arrays;

public class VarHandleTest {
   public static void main(String args[]) {
      <strong>VarHandle </strong>varHandle = <strong>MethodHandles.arrayElementVarHandl</strong>e(<strong>int[].class</strong>);
      int[] array = new int[5];

      printArray(array);
      varHandle.<strong>set</strong>(array, 2, 5);
      printArray(array);

      System.out.println(varHandle.<strong>get</strong>(array, 2));
   }
   private static void printArray(int[] array) {
      System.out.println(Arrays.toString(array));
   }
}

<strong>[0, 0, 0, 0, 0]
[0, 0, 5, 0, 0]
5</strong>