Java 9 の匿名クラスでダイヤモンド演算子を使用するにはどうすればよいですか?

public class DiamondOperatorTest {
   public static void main(String args[]) {
      <strong>Handler<Integer></strong> intHandler = new <strong>Handler<>(1)</strong> {
         <strong>@Override</strong>
         public void handle() {
            System.out.println(data);
         }
      };
      intHandler.handle();

      <strong>Handler<? extends Number></strong><!--? extends Number--> intHandler1 = new <strong>Handler<>(2)</strong> {
         <strong>@Override</strong>
         public void handle() {
            System.out.println(data);
         }
      };
      intHandler1.handle();

      <strong>Handler<?></strong><!--?--> handler = new <strong>Handler<>("test")</strong> {
         <strong>@Override
</strong>         public void handle() {
            System.out.println(data);
         }
      };
      handler.handle();
   }
}

abstract class Handler<T> {
   public T data;
   public Handler(T data) {
      this.data = data;
   }
   abstract void handle();
}