Java Reference
In-Depth Information
13.
a.
No. The default constructor creates an empty list. If it set
nextNode
to
firstNode
,
nextNode
would be set
to
null
.
b.
Yes, but with a disadvantage. Each addition to the list would set
nextNode
to
firstNode
. After creating a list,
you could traverse it. However, the only way you could reset the traversal to the list's beginning would be to
add another entry to the list.
14.
while
(traverse.hasNext())
traverse.next();
while
(traverse.hasPrevious())
System.out.println(traverse.previous());
15.
traverse.next();
// return Jim
traverse.next();
// return Josh
traverse.set("Jon");
// replace Josh
16.
traverse.next();
// return Jim
traverse.add("Miguel");
// add Miguel after Jim
