141. Introducing JDK 17 easy filter creation

Starting with JDK 17, we can express filters more intuitively and readably via two convenient methods named allowFilter() and rejectFilter(). And, since the best way to learn is with an example, here is a usage case of these two convenient methods:

public final class Filters {
 private Filters() {
  throw new AssertionError("Cannot be instantiated");
 }
 public static ObjectInputFilter allowMelonFilter() {
  ObjectInputFilter filter = ObjectInputFilter.allowFilter( 
   clazz -> Melon.class.isAssignableFrom(clazz),
           ObjectInputFilter.Status.REJECTED);
   return filter;
 }
 public static ObjectInputFilter rejectMuskmelonFilter() {
  ObjectInputFilter filter = ObjectInputFilter.rejectFilter( 
   clazz -> Muskmelon.class.isAssignableFrom(clazz),
           ObjectInputFilter.Status.UNDECIDED);
   return filter;
  }
}

The allowMelonFilter() relies on ObjectInputFilter.allowFilter() to allow only objects that...