1 /*
2 * Copyright 2009 Google, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test
26 * @bug 4245470 7088913
27 * @summary Test the primitive wrappers hashCode()
28 */
29
30 import java.util.Objects;
31 import java.util.Random;
32
33 public class HashCode {
34
35 final Random rnd = new Random();
36
37 void testOrdinals(String args[]) throws Exception {
38 long[] longs = {
39 Long.MIN_VALUE,
40 Integer.MIN_VALUE,
41 Short.MIN_VALUE,
42 Character.MIN_VALUE,
43 Byte.MIN_VALUE,
44 -1, 0, 1,
45 Byte.MAX_VALUE,
46 Character.MAX_VALUE,
47 Short.MAX_VALUE,
48 Integer.MAX_VALUE,
49 Long.MAX_VALUE,
50 rnd.nextInt(),
51 };
52
53 for (long x : longs) {
54 check( new Long(x).hashCode() == (int)((long)x ^ (long)x>>>32));
55 check(Long.valueOf(x).hashCode() == (int)((long)x ^ (long)x>>>32));
56 check( (new Long(x)).hashCode() == Long.hashCode(x));
57 check( new Integer((int)x).hashCode() == (int) x);
58 check(Integer.valueOf((int)x).hashCode() == (int) x);
59 check( (new Integer((int)x)).hashCode() == Integer.hashCode((int)x));
60 check( new Short((short)x).hashCode() == (short) x);
61 check(Short.valueOf((short)x).hashCode() == (short) x);
62 check( (new Short((short)x)).hashCode() == Short.hashCode((short)x));
63 check( new Character((char) x).hashCode() == (char) x);
64 check(Character.valueOf((char) x).hashCode() == (char) x);
65 check( (new Character((char)x)).hashCode() == Character.hashCode((char)x));
66 check( new Byte((byte) x).hashCode() == (byte) x);
67 check(Byte.valueOf((byte) x).hashCode() == (byte) x);
68 check( (new Byte((byte)x)).hashCode() == Byte.hashCode((byte)x));
69 }
70 }
71
72 void testBoolean() {
73 check( Boolean.FALSE.hashCode() == 1237);
74 check( Boolean.TRUE.hashCode() == 1231);
75 check( Boolean.valueOf(false).hashCode() == 1237);
76 check( Boolean.valueOf(true).hashCode() == 1231);
77 check( (new Boolean(false)).hashCode() == 1237);
78 check( (new Boolean(true)).hashCode() == 1231);
79 check( Boolean.hashCode(false) == 1237);
80 check( Boolean.hashCode(true) == 1231);
81 }
82
83 void testFloat() {
84 float[] floats = {
85 Float.NaN,
86 Float.NEGATIVE_INFINITY,
87 -1f,
88 0f,
89 1f,
90 Float.POSITIVE_INFINITY
91 };
92
93 for(float f : floats) {
94 check( Float.hashCode(f) == Float.floatToIntBits(f));
95 check( Float.valueOf(f).hashCode() == Float.floatToIntBits(f));
96 check( (new Float(f)).hashCode() == Float.floatToIntBits(f));
97 }
98 }
99
100 void testDouble() {
101 double[] doubles = {
102 Double.NaN,
103 Double.NEGATIVE_INFINITY,
104 -1f,
105 0f,
106 1f,
107 Double.POSITIVE_INFINITY
108 };
109
110 for(double d : doubles) {
111 long bits = Double.doubleToLongBits(d);
112 int bitsHash = (int)(bits^(bits>>>32));
113 check( Double.hashCode(d) == bitsHash);
114 check( Double.valueOf(d).hashCode() == bitsHash);
115 check( (new Double(d)).hashCode() == bitsHash);
116 }
117 }
118
119 //--------------------- Infrastructure ---------------------------
120 volatile int passed = 0, failed = 0;
121 void pass() {passed++;}
122 void fail() {failed++; Thread.dumpStack();}
123 void fail(String msg) {System.err.println(msg); fail();}
124 void unexpected(Throwable t) {failed++; t.printStackTrace();}
125 void check(boolean cond) {if (cond) pass(); else fail();}
126 void equal(Object x, Object y) {
127 if (Objects.equals(x,y)) pass();
128 else fail(x + " not equal to " + y);}
129 public static void main(String[] args) throws Throwable {
130 new HashCode().instanceMain(args);}
131 public void instanceMain(String[] args) throws Throwable {
132 try { testOrdinals(args);
133 testBoolean();
134 testFloat();
135 testDouble();
136 } catch (Throwable t) {unexpected(t);}
137 System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
138 if (failed > 0) throw new AssertionError("Some tests failed");}
139 }