List.remove(int index)新发现

今天无意间看到List源码中得remove（int index）方法，先上源码：

/**
     * Removes the element at the specified position in this list.
     * Shifts any subsequent elements to the left (subtracts one from their
     * indices).
     *
     * @param index the index of the element to be removed
     * @return the element that was removed from the list
     * @throws IndexOutOfBoundsException {@inheritDoc}
     */
    public E remove(int index) {
        rangeCheck(index);

        modCount++;
        E oldValue = elementData(index);

        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

        return oldValue;
    }

大家看一下源码 主要看一下返回值，是删除的那个元素，所以以后当我然们需要获得List中的某一个元素，然后然后删除的时候不需要执行两部操作，只要一步操作就行了，原来写法经常是

View view=List.get(0);
List.remove(0);
return view;

而现在return list.remove(index),这样一举两得，代码瞬间很简洁了