Java Reference
In-Depth Information
8 */
9
public class
LinkedList<E>
10 {
11 /**
12
Constructs an empty linked list.
13 */
14
public
LinkedList()
15 {
16 first =
null
;
17 }
18
19 /**
20
Returns the first element in the
linked list.
21 @return
the first element in the
linked list
22 */
23
public
E getFirst()
24 {
25
if
(first ==
null
)
26
throw new
NoSuchElementException();
27
return
first.data;
28 }
29
30 /**
31
Removes the first element in the
linked list.
32 @return
the removed element
33 */
34
public
E removeFirst()
35 {
36
if
(first ==
null
)
37
throw new
NoSuchElementException();
38 E element = first.data;
39 first = first.next;
40
return
element;
41 }
42
43 /**
44
Adds an element to the front of the
linked list.
45 @param element
the element to add
46 */
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