Java Reference
In-Depth Information
Display 15.8
A Generic Linked List Class
(part 1 of 3)
1
public
class
LinkedList3<T>
2{
3
private
class Node<T>
4
{
This linked list holds objects of type
T
.
The type
T
should have well-defined
equals
and
toString
methods.
5
private
T data;
6
private
Node<T> link;
7
public
Node( )
8
{
9
data =
null
;
10
link =
null
;
11
}
12
public
Node(T newData, Node<T> linkValue)
13
{
14
data = newData;
15
link = linkValue;
16
}
17
}
//End of Node<T> inner class
18
private
Node<T> head;
19
public
LinkedList3( )
20
{
21
head =
null
;
22
}
23
/**
24
Adds a node at the start of the list with the specified data.
25
The added node will be the first node in the list.
26
*/
27
public
void
addToStart(T itemData)
28
{
29
head =
new
Node<T>(itemData, head);
30
}
31
/**
32
Removes the head node and returns true if the list contained at least
33
one node. Returns false if the list was empty.
34
*/
35
public
boolean
deleteHeadNode( )
36
{
37
if
(head !=
null
)
38
{
39
head = head.link;
40
return true;
41
}
42
else
43
return false;
44
}
