admin管理员组文章数量:1660165
用于遍历和分割源元素的对象。
方法介绍
tryAdvance
// 如果存在元素,则执行Consumer并返回true并移至下一个元素。 如果没有元素返回false
private static void tryAdvance() {
List<String> list = new ArrayList<>(Arrays.asList("a", "b", "c"));
Spliterator<String> stringSpliterator = list.spliterator();
int a = 0;
while (stringSpliterator.tryAdvance(System.out::println)){
System.out.println(++a);
}
}
trySplit
// 将Spliterator拆分成多个来并行处理
private static void trySplit() {
List<String> values = new ArrayList<>(Arrays.asList("1", "2", "3", "4", "5", "6"));
Spliterator<String> firstSpliterator = values.spliterator();
Spliterator<String> secondSpliterator = firstSpliterator.trySplit();
Spliterator<String> thirdSpliterator = firstSpliterator.trySplit();
System.out.println("firstSpliterator : ");
while (firstSpliterator.tryAdvance(System.out::println)){}
System.out.println("secondSpliterator : ");
while (secondSpliterator.tryAdvance(System.out::println)){}
System.out.println("thirdSpliterator : ");
while (thirdSpliterator.tryAdvance(System.out::println)){}
}
forEachRemaining
// 剩余的元素传递给一个函数
private static void forEachRemaining() {
List<String> list = new ArrayList<>(Arrays.asList("a", "b", "c", "d", "e", "f"));
Spliterator<String> firstSpliterator = list.spliterator();
Spliterator<String> secondSpliterator = firstSpliterator.trySplit();
firstSpliterator.forEachRemaining(System.out::println);
System.out.println("-------");
secondSpliterator.forEachRemaining(System.out::println);
}
estimateSize
private static void estimateSizeAndCharacteristics() {
List<String> list = new ArrayList<>(Arrays.asList("a", "b", "c", "d", "e", "f"));
Spliterator<String> firstSpliterator = list.spliterator();
// estimateSize表示Splirerator中待处理的元素.
// characteristics表示这个Spliterator的特征,Spliterator有8大特征.
// 调用一次trySplit()后,将list分成了两部分,firstSpliterator为三条 ,secondSpliterator为两条
System.out.println("before forEachRemaining: " + firstSpliterator.estimateSize());
// 这个Characteristics=16464,转换为16进制:Ox4050 = ORDERED or SIZED or SUBSIZED 这三个的或运算。
System.out.println("Characteristics " + firstSpliterator.characteristics());
firstSpliterator.forEachRemaining(System.out::println);
// 调用forEachRemaining后,estimateSize变为0,表示所有的元素都已经被处理完毕。
System.out.println("after forEachRemaining" + firstSpliterator.estimateSize());
}
本文标签: Spliterator
版权声明:本文标题:Spliterator 内容由热心网友自发贡献,该文观点仅代表作者本人, 转载请联系作者并注明出处:https://m.elefans.com/dongtai/1729851340a1215455.html, 本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌抄袭侵权/违法违规的内容,一经查实,本站将立刻删除。
发表评论