Java ConcurrentLinkedDeque descendingIterator()用法及代碼示例

Java.util.concurrent.ConcurrentLinkedDeque.descendingIterator()方法用於返回與ConcurrentLinkedDeque相同的元素的迭代器，但順序相反。

用法:

Iterator iterate_value = Array_Deque.descendingIterator();

參數：該方法不帶任何參數。

返回值：該方法遍曆雙端隊列的元素，並以相反的順序返回值(迭代器)。

以下程序說明了Java.util.concurrent.ConcurrentLinkedDeque.descendingIterator()方法：

示例1:

// Java code to illustrate descendingIterator() 
  
import java.util.concurrent.*; 
import java.util.*; 
  
public class ConcurrentLinkedDequeDemo { 
    public static void main(String args[]) 
    { 
        // Creating an empty ConcurrentLinkedDeque 
        ConcurrentLinkedDeque<String> de_que 
            = new ConcurrentLinkedDeque<String>(); 
  
        // Use add() method to add elements into the Queue 
        de_que.add("Welcome"); 
        de_que.add("To"); 
        de_que.add("Geeks"); 
        de_que.add("4"); 
        de_que.add("Geeks"); 
  
        // Displaying the ConcurrentLinkedDeque 
        System.out.println("ConcurrentLinkedDeque: " + de_que); 
  
        // Creating a desc_iterator 
        Iterator value = de_que.descendingIterator(); 
  
        // Displaying the values after iterating 
        // through the ConcurrentLinkedDeque 
        // in reverse order 
        System.out.println("The iterator values are: "); 
        while (value.hasNext()) { 
            System.out.println(value.next()); 
        } 
    } 
}

輸出：

ConcurrentLinkedDeque: [Welcome, To, Geeks, 4, Geeks]
The iterator values are: 
Geeks
4
Geeks
To
Welcome

示例2:

// Java code to illustrate descendingIterator() 
  
import java.util.*; 
import java.util.concurrent.*; 
  
public class ConcurrentLinkedDequeDemo { 
    public static void main(String args[]) 
    { 
        // Creating an empty ConcurrentLinkedDeque 
        ConcurrentLinkedDeque<Integer> de_que 
            = new ConcurrentLinkedDeque<Integer>(); 
  
        // Use add() method to add elements into the Queue 
        de_que.add(10); 
        de_que.add(15); 
        de_que.add(30); 
        de_que.add(20); 
        de_que.add(5); 
  
        // Displaying the ConcurrentLinkedDeque 
        System.out.println("ConcurrentLinkedDeque: " + de_que); 
  
        // Creating a desc_iterator 
        Iterator value = de_que.descendingIterator(); 
  
        // Displaying the values after iterating 
        // through the ConcurrentLinkedDeque 
        // in reverse order 
        System.out.println("The iterator values are: "); 
        while (value.hasNext()) { 
            System.out.println(value.next()); 
        } 
    } 
}

輸出：

ConcurrentLinkedDeque: [10, 15, 30, 20, 5]
The iterator values are: 
5
20
30
15
10

相關用法

注：本文由純淨天空篩選整理自MerlynShelley大神的英文原創作品 ConcurrentLinkedDeque descendingIterator() method in Java with Example。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。