Java ArrayDeque pop()用法及代碼示例

Java中的Java.util.ArrayDeque.pop()方法用於從雙端隊列彈出一個元素。該元素從雙端隊列的頂部彈出，並從雙端隊列中刪除。

用法:

Array_Deque.pop()

參數：該方法不帶任何參數。

返回值：此方法返回在雙端隊列的前麵存在的元素。

異常：如果雙端隊列為空，則拋出NoSuchElementException異常。

下麵的程序演示了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); 
    } 
}

輸出：

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); 
    } 
}

輸出：

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

相關用法

注：本文由純淨天空篩選整理自Chinmoy Lenka大神的英文原創作品 ArrayDeque pop() 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。