So this linked list happened to be circular, but it could also have been terminated by using a next pointer value of 0 -- the null value -- which would indicate we've reached the end of the list.
Now you have to learn Java at Montana State University when I went, and so He's off there kind of explaining this whole linked list thing and all that.
If we want to enqueue someone, that is, add them to the line, we have to traverse down the linked list until we hit the end, and then change that next pointer to point to the new person.