Java中的LinkedList removeLast()方法

Java.util.LinkedList.removeLast() 方法用于从 LinkedList 中删除最后一个元素。此方法还会在删除元素后返回该元素。
句法：

LinkedList.removeLast()

参数：此函数不带任何参数。
返回值：该方法返回最后一个元素或存在于列表尾部的元素。
下面的程序说明了Java.util.LinkedList.removeLast() 方法：

Java

// Java code to illustrate removeLast()
import java.io.*;
import java.util.LinkedList;
 
public class LinkedListDemo {
    public static void main(String args[])
    {
        // Creating an empty LinkedList
        LinkedList list = new LinkedList();
 
        // Use add() method to add elements in the list
        list.add("Geeks");
        list.add("for");
        list.add("Geeks");
        list.add("10");
        list.add("20");
 
        // Displaying the list
        System.out.println("LinkedList:" + list);
 
        // Remove the tail using removeLast()
        System.out.println("The last element is removed: " + list.removeLast());
         
        // Displaying the final list
        System.out.println("Final LinkedList:" + list);
         
        // Remove the tail using removeLast()
        System.out.println("The last element is removed: " + list.removeLast());
 
        // Displaying the final list
        System.out.println("Final LinkedList:" + list);
    }
}

输出：

LinkedList:[Geeks, for, Geeks, 10, 20]
The last element is removed: 20
Final LinkedList:[Geeks, for, Geeks, 10]
The last element is removed: 10
Final LinkedList:[Geeks, for, Geeks]

removeLast() 的时间复杂度：O(1)