Java 9中takewhile()和dropWhile()方法的区别是什么？

<strong>default Stream<T> takeWhile(Predicate<? super T><!--? super T--> predicate)</strong>

import java.util.stream.Stream;
public class TakeWhileMethodTest {
   public static void main(String args[]) {
      <strong>Stream</strong>.<strong>of</strong>("India", "Australia", "Newzealand", "", "South Africa", "England")
      .<strong>takeWhile</strong>(o->!o.isEmpty())
      .forEach(System.out::print);
   }
}

<strong>IndiaAustraliaNewzealand
</strong>

<strong>default Stream<T> dropWhile(Predicate<? super T><!--? super T--> predicate)</strong>

import java.util.stream.Stream;
public class DropWhileMethodTest {
   public static void main(String args[]) {
      <strong>Stream</strong>.<strong>of</strong>("India", "Australia", "Newzealand", "", "England", "Srilanka")
      .<strong>dropWhile</strong>(o->!o.isEmpty())
      .forEach(System.out::print);
      System.out.println();
      <strong>Stream</strong>.<strong>of</strong>("India", "", "Australia", "", "England", "Srilanka")
      .<strong>dropWhile</strong>(o->!o.isEmpty())
      .forEach(System.out::print);
   }
}

<strong>EnglandSrilanka
AustraliaEnglandSrilanka</strong>