[英]How to update a value in an arraylist<arraylist<Integer>>
I have an array list array list, I am trying to change the value in a specific element, but it tells me that the left hand side must be a variable. 我有一个数组列表,数组列表,我试图更改特定元素中的值,但它告诉我左侧必须是变量。 I am trying to update using this, 我正在尝试使用此更新,
list.getMyList().get(4).get(5) = value;
Am I doing this incorrect, how would I update that element? 我做错了吗,如何更新该元素?
Use this instead if you have a 2D ArrayList: 如果您具有2D ArrayList,请改用此命令:
arrayLists.get(1).set(index, newValue);
Or this if you have a regular ArrayList: 如果您有常规的ArrayList,也可以这样:
arrayList.set(index, newValue);
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