Generics and the ArrayList Class - Absolute Java - page 782

Display 14.5 A Generic Ordered Pair Class (part 1 of 2)

1 public class Pair<T>
2 {
3 private T first;
4 private T second;

Constructor headings do not
include the type parameter in
angular brackets.

5 public Pair()
6 {
7 first = null ;
8 second = null ;
9 }

10 public Pair(T firstItem, T secondItem)
11 {
12 first = firstItem;
13 second = secondItem;
14 }

15 public void setFirst(T newFirst)
16 {
17 first = newFirst;
18 }

19 public void setSecond(T newSecond)
20 {
21 second = newSecond;
22 }

23 public T getFirst()
24 {
25 return first;
26 }

27 public T getSecond()
28 {
29 return second;
30 }

31 public String toString()
32 {
33 return ( "first: " + first.toString() + "\n"
34 + "second: " + second.toString() );
35 }
36