Java 中是否有不可变的单链表实现？

Question

Coming from functional background, I am looking for equivalent of immutable singly linked list in Java.

Immutable singly linked lists give me freedom to define many lists with common tail. For example, if I have list = [1,2,3] and then I am creating two new lists:

first = [10 | list]
second = [15 | list]

I am not copying the list. Internally it looks more like this:

first -> 10 -> 1 -> 2 -> 3 -> null
second -> 15  /|\

I looked at Guava Lists, but I couldn't find information on implementation details. As far as I understand, it is a doubly linked list, so efficient prepend operation is impossible (please correct me, if I am wrong about that).

Answer 1

Did you try Functional Java ? Also there's similar question , you could use that algorithm and make singly list from double.

Answer 2

试试Vavr，它是开源的，所以你可以看到内部实现。