LinkedList操作

import java.util.Iterator;import java.util.LinkedList;public class linkedlist {public static void main(String[] args){LinkedList list = new LinkedList();list.add("a1");list.add("a2");//添加到列表开头list.addFirst("a3");System.out.println(list);//取出并移除首元素System.out.println("r_f:"+list.removeFirst());Iterator it = list.iterator();while(it.hasNext()){System.out.println(it.next());}}}