Java ArrayDeque pop()用法及代码示例

Java中的Java.util.ArrayDeque.pop()方法用于从双端队列弹出一个元素。该元素从双端队列的顶部弹出，并从双端队列中删除。

用法:

Array_Deque.pop()

参数：该方法不带任何参数。

返回值：此方法返回在双端队列的前面存在的元素。

异常：如果双端队列为空，则抛出NoSuchElementException异常。

下面的程序演示了Java.util.ArrayDeque.pop()方法：
示例1:

// Java code to illustrate pop() 
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 
        de_que.add("Welcome"); 
        de_que.add("To"); 
        de_que.add("Geeks"); 
        de_que.add("For"); 
        de_que.add("Geeks"); 
  
        // Displaying the ArrayDeque 
        System.out.println("Initial ArrayDeque: " + de_que); 
  
        // Removing elements using pop() method 
        System.out.println("Popped element: " + de_que.pop()); 
        System.out.println("Popped element: " + de_que.pop()); 
  
        // Displaying the ArrayDeque after pop 
        System.out.println("Deque after operation "
                           + de_que); 
    } 
}

输出：

Initial ArrayDeque: [Welcome, To, Geeks, For, Geeks]
Popped element: Welcome
Popped element: To
Deque after operation [Geeks, For, Geeks]

示例2:

// Java code to illustrate pop() 
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 Deque 
        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("Initial ArrayDeque: " + de_que); 
  
        // Removing elements using pop() method 
        System.out.println("Popped element: " + de_que.pop()); 
        System.out.println("Popped element: " + de_que.pop()); 
  
        // Displaying the ArrayDeque after pop 
        System.out.println("Deque after operation "
                           + de_que); 
    } 
}

输出：

Initial ArrayDeque: [10, 15, 30, 20, 5]
Popped element: 10
Popped element: 15
Deque after operation [30, 20, 5]

相关用法

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 pop() 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。