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Java ArrayDeque descendingIterator()用法及代码示例


Java.util.ArrayDeque.descendingIterator()方法用于返回与ArrayDeque相同的元素的迭代器,但顺序相反。

用法:

Iterator iterate_value = Array_Deque.descendingIterator();

参数:该方法不带任何参数。


返回值:该方法遍历双端队列的元素,并以相反的顺序返回值(迭代器)。

以下程序说明了Java.util.ArrayDeque.descendingIterator()方法:
程序1:

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

程序2:

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


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注:本文由纯净天空筛选整理自Chinmoy Lenka大神的英文原创作品 ArrayDeque descendingIterator() Method in Java。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。