This is the time complexity of removing from the back of a circular doubly linked list with a head reference.

This data structure is used by the JVM to store method invocations.

This is the running time complexity of removing from the back of a singly linked list with a tail referencei.imgur.com/Z1XfZyy.pngawefawef

As of Java 8, this method is no longer required to be overriden when implementing the iterator interface.

The following method to reverse a linked list is missing two lines of code.