版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/weijianpeng2013_2015/article/details/78880106
//把数组中后面的覆盖前面的,然后size减一
private void fastRemove(int index) {
modCount++;
int numMoved = size - index - 1;
if (numMoved > 0)
System.arraycopy(elementData, index+1, elementData, index,
numMoved);
elementData[--size] = null; // clear to let GC do its work
}