Java 集合 从LinkedList删除所有元素

import java.util.LinkedList;
public class RemoveAllExample {

 public static void main(String[] args) {

    // Create a LinkedList
    LinkedList<String> linkedlist = new LinkedList<String>();

    // Add elements to LinkedList
    linkedlist.add("Item1");
    linkedlist.add("Item2");
    linkedlist.add("Item3");
    linkedlist.add("Item4");
    linkedlist.add("Item5");

    // Displaying Elements before remove
    System.out.println("Before clear():");
    for(String str: linkedlist){
       System.out.println(str);
    }

    // Removing all the elements from LinkedList
    linkedlist.clear();

    // LinkedList elements after remove
    System.out.println("After clear():");
    for(String str2: linkedlist){
       System.out.println(str2);
    }
 }
}

Before clear():
Item1
Item2
Item3
Item4
Item5
After clear():