如何访问 ArrayList 中的上一个/下一个元素? [英] How can I access the previous/next element in an ArrayList?

问题描述

我以这种方式遍历 ArrayList:

I iterate through an ArrayList this way:

for (T t : list){
  ...
}

当我这样做的时候，我从没想过我必须访问这个元素的前一个和下一个元素.现在我的代码很大.如果我用以下方式重写它会花费很多:

When I did this, I never thought I had to access the previous and next elements of this element. Now my code is huge. It costs a lot if I rewrite it with:

for (int i = 0; i < list.size(); i++){
  ...
}

推荐答案

我觉得我找到的解决方案其实很简单，但是我不能删除这个帖子，因为它有答案..

I think I found the solution it is simple in fact, but I cannot delete this post already because it has answers..

我刚刚在第二个 for 循环中添加了 T t = list.get(i);，所有其他代码保持不变.

I just added T t = list.get(i); in the second for-loop, all other code remains unchanged.

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