The type of the expression must be an array type but it resolved to ListObj
List<Obj> OldPictures = Lists.newArrayList();
Obj temp1 = oldPictures[i];
提示错误：
The type of the expression must be an array type but it resolved to List<Obj>
解决方法：j将第二句改写如下，因为数组才可以直接使用索引得到当前位置的对象，而list只能通过get(index)得到
Obj temp1 = oldPictures.get(i);
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