Java Reference
In-Depth Information
Display 13.6
Sorting Arrays of
Comparable
(part 1 of 2)
1
/**
2
Demonstrates sorting arrays for classes that
3
implement the Comparable interface.
4
*/
5
public class
ComparableDemo
6 {
7
public static void
main(String[] args)
8 {
9 Double[] d =
new
Double[10];
10
for
(
int
i = 0; i < d.length; i++)
11 d[i] =
new
Double(d.length - i);
The classes
Double
and
String
do
implement the
Comparable
interface.
12 System.out.println("Before sorting:");
13
int
i;
14
for
(i = 0; i < d.length; i++)
15 System.out.print(d[i].doubleValue() + ", ");
16 System.out.println();
17 GeneralizedSelectionSort.sort(d, d.length);
18 System.out.println("After sorting:");
19
for
(i = 0; i < d.length; i++)
20 system.out.print(d[i].doubleValue() + ", ");
21 System.out.println();
22 String[] a =
new
String[10];
23 a[0] = "dog";
24 a[1] = "cat";
25 a[2] = "cornish game hen";
26
int
numberUsed = 3;
27 System.out.println("Before sorting:");
28
for
(i = 0; i < numberUsed; i++)
29 System.out.print(a[i] + ", ");
30 System.out.println();
31
32 GeneralizedSelectionSort.sort(a, numberUsed);
33 System.out.println("After sorting:");
34 for (i = 0; i < numberUsed; i++)
35 System.out.print(a[i] + ", ");
36 System.out.println();
37 }
38 }
(continued)
