list
list在util下面
ArrayList在uill下面
LinkedList是一个双向链表结构。方便元素添加,删除的集合
public class LinkedListDemo { public static void main(String[] args) { LinkedList<String> link=new LinkedList<String>(); link.addFirst("abc1"); link.addFirst("abc2"); link.addFirst("abc3"); System.out.println(link); System.out.println(link.getFirst()); System.out.println(link.getLast()); System.out.println(link.removeFirst()); System.out.println(link); }
}
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