Java Reference
In-Depth Information
Display 15.9
A Sample Class for the Data in a Generic Linked List
1
public class
Entry
2 {
3
private
String item;
4
private int
count;
5
public
Entry(String itemData,
int
countData)
6 {
7 item = itemData;
8 count = countData;
9 }
10
public
String toString( )
11 {
12
return
(item + " " + count);
13 }
14
public boolean
equals(Object otherObject)
15 {
16
if
(otherObject ==
null
)
17
return false
;
18
else if
(getClass( ) != otherObject.getClass( ))
19
return false
;
20
else
21 {
22 Entry otherEntry = (Entry)otherObject;
23
return
(item.equals(otherEntry.item)
24 && (count == otherEntry.count));
25 }
26 }
<There should be other constructors and methods, including accessor
and mutator methods, but we do not use them in this demonstration.>
27 }
Display 15.10
A Generic Linked List Demonstration
(part 1 of 2)
1
public class
GenericLinkedListDemo
2 {
3
public static void
main(String[] args)
4 {
5 LinkedList3<Entry> list =
new
LinkedList3<Entry>( );
6 Entry entry1 =
new
Entry("Apples", 1);
7 list.addToStart(entry1);
8 Entry entry2 =
new
Entry("Bananas", 2);
9 list.addToStart(entry2);
10 Entry entry3 =
new
Entry("Cantaloupe", 3);
11 list.addToStart(entry3);
12 System.out.println("List has " + list.size( )
13 + " nodes.");
(continued)
