import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.reflect.Constructor;
import java.util.EnumSet;
 
class EnumHack {
    public static void main(String[] args) throws Throwable {
        System.out.println(Runtime.version());
        Constructor<Example> c
            = Example.class.getDeclaredConstructor(String.class, int.class);
        c.setAccessible(true);
        MethodHandle h = MethodHandles.lookup().unreflectConstructor(c);
        Example baz = (Example) h.invokeExact("BAZ", 42);
        System.out.println("created Example " + baz + "(" + baz.ordinal() + ')');
        EnumSet<Example> set = EnumSet.allOf(Example.class);
        System.out.println(set.contains(baz));
        set.add(baz);
        System.out.println(set);
    }
 
    enum Example {
        FOO, BAR
    }
}

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