We need a linked list to hold information about penguins in a zoo. You will need the following integers for your IntNode (see below).
We need a linked list to hold information about penguins in a zoo. You will need the following integers for your IntNode (see below). I have included sample values for one of the penguins:
- penguin ID: 45821
- penguin weight (kg): 11
- penguin height (cm): 90
We now need to track the number of penguins in the zoo. I would like to propose a better way to track the size of the list. Rather than traversing the list every time you need to know its size, why not keep a variable called listSize that increments every time you add a node to the list and decrements anytime you remove an item from the list?
public class penguinList { //nested class IntNode goes here private IntNode first; private int listSize; //...the methods of penguinList class go here }
- Now, you just need to increment the listSize instance variable in every method that adds a node to the list.
- If you have any methods that removes a node from the list, decrement the listSize instance variable in those methods instead.
- Finally, if you have any, remove the size methods that use traversals. You will now only need one size method, which should return the listSize instance variable. That's it!
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