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());
		}
	}
}