try and test

slowant

于 2013-08-21 10:47:36 发布

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

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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];
}