1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
/*
* Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @summary Verify nextDouble stays within range
* @bug 8280550 8280950 8281183
*/
import java.util.SplittableRandom;
public class RandomNextDoubleBoundary {
public static void main(String... args) {
negativeBounds();
positiveBounds();
}
private static void negativeBounds() {
// Both bounds are negative
double lowerBound = -1.0000000000000002;
double upperBound = -1.0;
var sr = new SplittableRandom(42L);
var r = sr.nextDouble(lowerBound, upperBound);
if (r >= upperBound) {
System.err.println("r = " + r + "\t" + Double.toHexString(r));
System.err.println("ub = " + upperBound + "\t" + Double.toHexString(upperBound));
throw new RuntimeException("Greater than upper bound");
}
if (r < lowerBound) {
System.err.println("r = " + r + "\t" + Double.toHexString(r));
System.err.println("lb = " + lowerBound + "\t" + Double.toHexString(lowerBound));
throw new RuntimeException("Less than lower bound");
}
}
private static void positiveBounds() {
double[][] originAndBounds = {{10, 100},
{12345, 123456},
{5432167.234, 54321678.1238}};
for (double[] originAndBound : originAndBounds) {
nextDoublesWithRange(originAndBound[0], originAndBound[1]);
}
}
public static void nextDoublesWithRange(double origin, double bound) {
SplittableRandom rg = new SplittableRandom(42L);
double value = rg.nextDouble(origin, bound);
if (bound > 0) {
value = rg.nextDouble(bound); // Equivalent to nextDouble(0.0, bound)
assertTrue(value >= 0.0);
assertTrue(value < bound);
}
}
public static void assertTrue(boolean condition) {
if (!condition) {
throw new AssertionError();
}
}
}
|
