
Explanation of Solution
Linked list:
- Linked List is a data structure which is used to collect a sequence of objects which will allows the efficient access of elements such as adding and removing of elements even from the middle of the sequence.
- It contains numbers of nodes where each node will have a reference to the next.
- To access the elements present inside the linked list the list iterator can be utilized.
Iterator:
Iterators are used to access the elements present inside the linked list.
Output of the code:
The code will print the following:
Diana
Romeo
Harry
Juliet
Explanation:
In the notations described below the list is enclosed by [
and ] for linked list
, and the iterator is indicated by a |.
Step 1:
The value “Tom” is added to the list “staff”:
iterator.add("Tom");
staff = ["Tom"|]
Step 2:
The value “Diana” is added to the list “staff”:
iterator.add("Diana");
staff = ["Tom", "Diana"|]
Step 3:
The value “Harry” is added to the list “staff”:
iterator.add("Harry");
staff = ["Tom", "Diana", "Harry"|]
Step 4:
The iterator is being assigned with the list “staff”.
iterator = staff.listIterator();
staff = [|"Tom", "Diana", "Harry"]
Step 5:
Now the iterator value is moved to the next value list staff.
iterator.next();
staff = ["Tom", |"Diana", "Harry"]
Step 6:
Now the iterator value is moved to the next value list staff.
iterator.next();
staff = ["Tom", "Diana", |"Harry"]
Step 7:
The value “Romeo” is added to the list “staff”:
iterator...

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Chapter 15 Solutions
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