访问嵌套LinkedList中项目的子项目

Question

I want to access an item within an item of nested LinkedList. The get(index) function gets you the complete item. Is there any method to get item within an item. eg I have a nested LinkedList with items as : [ [[1],[2],[3]], [[4],[5],[6]], [[7],[8],[9]] ] . When I use get(0) , it returns [[1],[2],[3]] . Now I want to access item [1], [2] and [3] separately but don't know how to do it. I know that there will be some method to do it but I am new to java, so need help. Thanks.

Answer 1

假设您使用的是类似LinkedList<LinkedList<Integer>> ，请使用get(0).get(index)

Answer 2

The get() method returns you a element so you either assign it to a object and use it from there or just call the methods inline.

1

LinkedList foo = myList.get(index);
int bar = foo.get(newIndex);

2

int foo = myList.get(index).get(newIndex);

I rather use the first one because it's easier to read.