LinkedList公共对象pollLast()方法 (LinkedList public Object pollLast() method)

• This method is available in package java.util.LinkedList.pollLast().

  软件包java.util.LinkedList.pollLast()中提供了此方法。

• This method is used to retrieves the last or ending element of the linked list and removes the last element from the list finally.

  此方法用于检索链表的最后一个元素或结尾元素，最后从列表中删除最后一个元素。

• If the list is empty then it will return null.

  如果列表为空，则它将返回null。

Syntax:

句法：

    public Object pollLast(){
}

Parameter(s):

参数：

In this method, we don’t pass any object as a parameter in the method but it returns the last object from the linked list and then remove the last element from the list.

在此方法中，我们不会在该方法中传递任何对象作为参数，但它会从链接列表中返回最后一个对象，然后从列表中删除最后一个元素。

Return value:

返回值：

The return type of this method is not void that means this method returns last object or element (i.e. It returns only last element in the list). If the list is empty then it will not give any exception.

该方法的返回类型不是void，这意味着该方法返回最后一个对象或元素(即，它仅返回列表中的最后一个元素)。 如果列表为空，则不会给出任何异常。

Java程序演示LinkedList pollLast()方法的示例 (Java program to demonstrate example of LinkedList pollLast() method)

import java.util.LinkedList;
public class LinkList {public static void main(String[] args) {LinkedList list = new LinkedList();
// use add() method to add elements in the list
list.add(10);
list.add(20);
list.add(30);
list.add(40);
list.add(50);
//  Current list Output
System.out.println("The Current list is:" + list);
//  Using pollLast() method it will retrieve last element
// with removing the last element from the list
System.out.println("The Last Element In The List is:" + list.pollLast());
//  Updated list Output after implementing pollLast()
System.out.println("The Updated List after implementing pollLast() The list is:" + list);
}
}

Output

输出量

D:\Programs>javac LinkList.java
D:\Programs>java LinkList
The Current list is:[10, 20, 30, 40, 50]
The Last Element In The List is:50
The Updated List after implementing pollLast() The list is:[10, 20, 30, 40]

翻译自: https://www.includehelp.com/java/linkedlist-public-object-polllast-method-with-example.aspx