Java ConcurrentSkipListSet descendingIterator()用法及代碼示例

java.util.concurrent.ConcurrentSkipListSet的descendingIterator()方法是Java中的內置函數，用於按降序返回此集合中元素的迭代器。

用法:

ConcurrentSkipListSet.descendingIterator()

返回值：函數以降序返回此集合中元素的迭代器。

以下示例程序旨在說明ConcurrentSkipListSet.descendingIterator()方法：

程序1:

// Java Program Demonstrate descendingIterator() 
// method of ConcurrentSkipListSet  
  
import java.util.Iterator; 
import java.util.concurrent.ConcurrentSkipListSet; 
  
class ConcurrentSkipListSetIteratorExample1 { 
    public static void main(String[] args) 
    { 
  
        // Initializing the set 
        ConcurrentSkipListSet<String> 
            set = new ConcurrentSkipListSet<String>(); 
  
        // Adding elements to this set 
        set.add("Gfg"); 
        set.add("is"); 
        set.add("fun!!"); 
  
        // Returns an iterator over the elements 
        Iterator<String> iterator = set.descendingIterator(); 
  
        // Printing the elements of the set 
        while (iterator.hasNext()) 
            System.out.print(iterator.next() + " "); 
    } 
}

輸出：

is fun!! Gfg

程序2:

// Java Program Demonstrate descendingIterator() 
// method of ConcurrentSkipListSet  
  
import java.util.Iterator; 
import java.util.concurrent.ConcurrentSkipListSet; 
  
class ConcurrentSkipListSetIteratorExample1 { 
    public static void main(String[] args) 
    { 
  
        // Initializing the set 
        ConcurrentSkipListSet<Integer> 
            set = new ConcurrentSkipListSet<Integer>(); 
  
        // Adding elements to this set 
        set.add(10); 
        set.add(15); 
        set.add(20); 
        set.add(25); 
  
        // Returns an iterator over the elements 
        Iterator<Integer> iterator = set.descendingIterator(); 
  
        // Printing the elements of the set 
        while (iterator.hasNext()) 
            System.out.print(iterator.next() + " "); 
    } 
}

輸出：

25 20 15 10

參考： https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentSkipListSet.html#descendingIterator-

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注：本文由純淨天空篩選整理自rupesh_rao大神的英文原創作品 ConcurrentSkipListSet descendingIterator() method in Java。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。