Java 中的 ConcurrentSkipListSet spliterator() 方法

java.util.concurrent.ConcurrentSkipListSet.spliterator() 方法是Java中的一个内置函数，它返回一个弱一致性的Spliterator，跨越这个集合中的元素。

语法：

ConcurrentSkipListSet.spliterator()

参数： 此函数不接受任何参数。

返回值： 此函数返回跨越此集合中元素的Spliterator。

以下程序说明了 ConcurrentSkipListSet.spliterator() 方法:

程序1:

// Java Program Demonstrate Spliterator()
// method of ConcurrentSkipListSet
  
import java.util.Spliterator;
import java.util.concurrent.ConcurrentSkipListSet;
  
class ConcurrentSkipListSetSpliteratorExample1 {
    public static void main(String[] args)
    {
        // 初始化此集合
        ConcurrentSkipListSet<String> set = 
                    new ConcurrentSkipListSet<String>();
  
        // 向该集合添加元素
        set.add("Gfg");
        set.add("is");
        set.add("best!!");
  
        // spliterator 分割和迭代
        // 并行处理分割部分
        Spliterator<String> str = set.spliterator();
  
        // 对剩余的每个元素执行操作
        str.forEachRemaining(
            (n) -> {
                String lc = n.toUpperCase();
                System.out.println(" Lower case = " + n);
                System.out.println(" Upper case = " + lc);
                System.out.println();
            });
    }
}

Lower case = Gfg
Upper case = GFG

Lower case = best!!
Upper case = BEST!!

Lower case = is
Upper case = IS

程序2:

// Java Program Demonstrate Spliterator()
// method of ConcurrentSkipListSet
  
import java.util.Spliterator;
import java.util.concurrent.ConcurrentSkipListSet;
  
class ConcurrentSkipListSetSpliteratorExample2 {
    public static void main(String[] args)
    {
        // 初始化此集合
        ConcurrentSkipListSet<Character> set = 
                         new ConcurrentSkipListSet<Character>();
  
        // 向该集合添加元素
        for (char ch = 'A'; ch <= 'Z'; ch++) {
            set.add(ch);
        }
  
        // 打印该集合中的元素
        System.out.print("The elements in the set are : ");
  
        // spliterator 分割和迭代
        // 并行处理分割部分
        Spliterator<Character> str = set.spliterator();
  
        // 如果元素存在，则tryAdvance()会执行操作
        while (str.tryAdvance((n) -> System.out.print(n + " ")))
            ;
    }
}

The elements in the set are : A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

参考资料： https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentSkipListSet.html#spliterator–