try and test

最新推荐文章于 2024-03-14 09:15:00 发布

slowant

最新推荐文章于 2024-03-14 09:15:00 发布

阅读量557

点赞数

CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/slowant/article/details/10136655

public synchronized E firstElement() {
if (elementCount == 0) {
            throw new NoSuchElementException();
        }
return (E)elementData[0];
 }

public synchronized E lastElement() {
if (elementCount == 0) {
        throw new NoSuchElementException();
        }
return (E)elementData[elementCount - 1];
}