Java.util.LinkedList.poll() 方法

package com.codingdict;

import java.util.*;

public class LinkedListDemo {
   public static void main(String[] args) {

      // create a LinkedList
      LinkedList list = new LinkedList();

      // add some elements
      list.add("Hello");
      list.add(2);
      list.add("Chocolate");
      list.add("10");

      // print the list
      System.out.println("LinkedList:" + list);

      // retrieve and remove the head of the list
      System.out.println("Head element of the list:" + list.poll());

      // print the list
      System.out.println("LinkedList:" + list);
   }
}