1 |
|
/* |
2 |
< |
* @test %I% %E% |
3 |
< |
* @bug 4486658 |
4 |
< |
* @summary Checks that a priority queue returns elements in sorted order across various operations |
2 |
> |
* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
> |
* Expert Group and released to the public domain, as explained at |
4 |
> |
* http://creativecommons.org/publicdomain/zero/1.0/ |
5 |
|
*/ |
6 |
|
|
7 |
|
/* |
8 |
< |
* Written by Doug Lea with assistance from members of JCP JSR-166 |
9 |
< |
* Expert Group and released to the public domain, as explained at |
10 |
< |
* http://creativecommons.org/licenses/publicdomain |
8 |
> |
* @test |
9 |
> |
* @bug 4486658 |
10 |
> |
* @summary Checks that a priority queue returns elements in sorted order across various operations |
11 |
|
*/ |
12 |
|
|
13 |
< |
import java.util.*; |
13 |
> |
import java.util.ArrayList; |
14 |
> |
import java.util.Collections; |
15 |
> |
import java.util.Comparator; |
16 |
> |
import java.util.Iterator; |
17 |
> |
import java.util.List; |
18 |
> |
import java.util.PriorityQueue; |
19 |
> |
import java.util.Queue; |
20 |
|
|
21 |
|
public class PriorityQueueSort { |
22 |
|
|
23 |
< |
static class MyComparator implements Comparator<Integer> { |
23 |
> |
static class MyComparator implements Comparator<Integer> { |
24 |
|
public int compare(Integer x, Integer y) { |
25 |
|
int i = x.intValue(); |
26 |
|
int j = y.intValue(); |
34 |
|
int n = 10000; |
35 |
|
if (args.length > 0) |
36 |
|
n = Integer.parseInt(args[0]); |
37 |
< |
|
38 |
< |
List<Integer> sorted = new ArrayList<Integer>(n); |
37 |
> |
|
38 |
> |
List<Integer> sorted = new ArrayList<>(n); |
39 |
|
for (int i = 0; i < n; i++) |
40 |
|
sorted.add(new Integer(i)); |
41 |
< |
List<Integer> shuffled = new ArrayList<Integer>(sorted); |
41 |
> |
List<Integer> shuffled = new ArrayList<>(sorted); |
42 |
|
Collections.shuffle(shuffled); |
43 |
|
|
44 |
< |
Queue<Integer> pq = new PriorityQueue<Integer>(n, new MyComparator()); |
44 |
> |
Queue<Integer> pq = new PriorityQueue<>(n, new MyComparator()); |
45 |
|
for (Iterator<Integer> i = shuffled.iterator(); i.hasNext(); ) |
46 |
|
pq.add(i.next()); |
47 |
|
|
48 |
< |
List<Integer> recons = new ArrayList<Integer>(); |
48 |
> |
List<Integer> recons = new ArrayList<>(); |
49 |
|
while (!pq.isEmpty()) |
50 |
|
recons.add(pq.remove()); |
51 |
|
if (!recons.equals(sorted)) |
52 |
|
throw new RuntimeException("Sort test failed"); |
53 |
|
|
54 |
|
recons.clear(); |
55 |
< |
pq = new PriorityQueue<Integer>(shuffled); |
55 |
> |
pq = new PriorityQueue<>(shuffled); |
56 |
|
while (!pq.isEmpty()) |
57 |
|
recons.add(pq.remove()); |
58 |
|
if (!recons.equals(sorted)) |
59 |
|
throw new RuntimeException("Sort test failed"); |
60 |
|
|
61 |
|
// Remove all odd elements from queue |
62 |
< |
pq = new PriorityQueue<Integer>(shuffled); |
62 |
> |
pq = new PriorityQueue<>(shuffled); |
63 |
|
for (Iterator<Integer> i = pq.iterator(); i.hasNext(); ) |
64 |
|
if ((i.next().intValue() & 1) == 1) |
65 |
|
i.remove(); |
75 |
|
throw new RuntimeException("Iterator remove test failed."); |
76 |
|
} |
77 |
|
} |
72 |
– |
|