Recursion Diagram for             Sequence of Activations, 
List Example with recursive       Terminations and Outputs
call and output reversed.

                 printList(5)
                      |           Activate printList(5)
System.out.println(5) |           n > 0 so output n == 5 
                      |           Activate printList(4)
                 printList(4)     n > 0 so output n == 4
                      |           Activate printList(3)
System.out.println(4) |           n > 0 so output n == 3
                      |           Activate printList(2)
                 printList(3)     n > 0 so output n == 2
                      |           Activate printList(1)
System.out.println(3) |           n > 0 so output n == 1 
                      |           Activate printList(0)
                 printList(2)     n > 0 is false, so no output.
                      |           Terminate printList(0)
System.out.println(2) |           Terminate printList(1)
                      |           Terminate printList(2)
                 printList(1)     Terminate printList(3)
                      |           Terminate printList(4)
System.out.println(1) |           Terminate printList(5)
                      |
                 printList(0)