| /* |
| * Copyright 2009 Google, Inc. 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 |
| * @bug 4245470 7088913 |
| * @summary Test the primitive wrappers hashCode() |
| * @key randomness |
| */ |
| |
| import java.util.Objects; |
| import java.util.Random; |
| |
| public class HashCode { |
| |
| final Random rnd = new Random(); |
| |
| void testOrdinals(String args[]) throws Exception { |
| long[] longs = { |
| Long.MIN_VALUE, |
| Integer.MIN_VALUE, |
| Short.MIN_VALUE, |
| Character.MIN_VALUE, |
| Byte.MIN_VALUE, |
| -1, 0, 1, |
| Byte.MAX_VALUE, |
| Character.MAX_VALUE, |
| Short.MAX_VALUE, |
| Integer.MAX_VALUE, |
| Long.MAX_VALUE, |
| rnd.nextInt(), |
| }; |
| |
| for (long x : longs) { |
| check( new Long(x).hashCode() == (int)((long)x ^ (long)x>>>32)); |
| check(Long.valueOf(x).hashCode() == (int)((long)x ^ (long)x>>>32)); |
| check( (new Long(x)).hashCode() == Long.hashCode(x)); |
| check( new Integer((int)x).hashCode() == (int) x); |
| check(Integer.valueOf((int)x).hashCode() == (int) x); |
| check( (new Integer((int)x)).hashCode() == Integer.hashCode((int)x)); |
| check( new Short((short)x).hashCode() == (short) x); |
| check(Short.valueOf((short)x).hashCode() == (short) x); |
| check( (new Short((short)x)).hashCode() == Short.hashCode((short)x)); |
| check( new Character((char) x).hashCode() == (char) x); |
| check(Character.valueOf((char) x).hashCode() == (char) x); |
| check( (new Character((char)x)).hashCode() == Character.hashCode((char)x)); |
| check( new Byte((byte) x).hashCode() == (byte) x); |
| check(Byte.valueOf((byte) x).hashCode() == (byte) x); |
| check( (new Byte((byte)x)).hashCode() == Byte.hashCode((byte)x)); |
| } |
| } |
| |
| void testBoolean() { |
| check( Boolean.FALSE.hashCode() == 1237); |
| check( Boolean.TRUE.hashCode() == 1231); |
| check( Boolean.valueOf(false).hashCode() == 1237); |
| check( Boolean.valueOf(true).hashCode() == 1231); |
| check( (new Boolean(false)).hashCode() == 1237); |
| check( (new Boolean(true)).hashCode() == 1231); |
| check( Boolean.hashCode(false) == 1237); |
| check( Boolean.hashCode(true) == 1231); |
| } |
| |
| void testFloat() { |
| float[] floats = { |
| Float.NaN, |
| Float.NEGATIVE_INFINITY, |
| -1f, |
| 0f, |
| 1f, |
| Float.POSITIVE_INFINITY |
| }; |
| |
| for(float f : floats) { |
| check( Float.hashCode(f) == Float.floatToIntBits(f)); |
| check( Float.valueOf(f).hashCode() == Float.floatToIntBits(f)); |
| check( (new Float(f)).hashCode() == Float.floatToIntBits(f)); |
| } |
| } |
| |
| void testDouble() { |
| double[] doubles = { |
| Double.NaN, |
| Double.NEGATIVE_INFINITY, |
| -1f, |
| 0f, |
| 1f, |
| Double.POSITIVE_INFINITY |
| }; |
| |
| for(double d : doubles) { |
| long bits = Double.doubleToLongBits(d); |
| int bitsHash = (int)(bits^(bits>>>32)); |
| check( Double.hashCode(d) == bitsHash); |
| check( Double.valueOf(d).hashCode() == bitsHash); |
| check( (new Double(d)).hashCode() == bitsHash); |
| } |
| } |
| |
| //--------------------- Infrastructure --------------------------- |
| volatile int passed = 0, failed = 0; |
| void pass() {passed++;} |
| void fail() {failed++; Thread.dumpStack();} |
| void fail(String msg) {System.err.println(msg); fail();} |
| void unexpected(Throwable t) {failed++; t.printStackTrace();} |
| void check(boolean cond) {if (cond) pass(); else fail();} |
| void equal(Object x, Object y) { |
| if (Objects.equals(x,y)) pass(); |
| else fail(x + " not equal to " + y);} |
| public static void main(String[] args) throws Throwable { |
| new HashCode().instanceMain(args);} |
| public void instanceMain(String[] args) throws Throwable { |
| try { testOrdinals(args); |
| testBoolean(); |
| testFloat(); |
| testDouble(); |
| } catch (Throwable t) {unexpected(t);} |
| System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
| if (failed > 0) throw new AssertionError("Some tests failed");} |
| } |