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 8080535 8191410
27 * @summary Expected size of Character.UnicodeBlock.map is not optimal
28 * @library /test/lib
29 * @modules java.base/java.lang:open
30 * java.base/java.util:open
31 * @build jdk.test.lib.util.OptimalCapacity
32 * @run main OptimalMapSize
33 */
34
35 import jdk.test.lib.util.OptimalCapacity;
36
37 // What will be the number of the Unicode blocks in the future.
38 //
39 // According to http://www.unicode.org/versions/Unicode7.0.0/ ,
40 // in Unicode 7 there will be added 32 new blocks (96 with aliases).
41 // According to http://www.unicode.org/versions/beta-8.0.0.html ,
42 // in Unicode 8 there will be added 10 more blocks (30 with aliases).
43 //
44 // After implementing support of Unicode 9 and 10 in Java, there will
45 // be 638 entries in Character.UnicodeBlock.map.
46 //
47 // Initialization of the map and this test will have to be adjusted
48 // accordingly then.
49
50 public class OptimalMapSize {
51 public static void main(String[] args) throws Throwable {
52 // The initial size of Character.UnicodeBlock.map.
53 // See src/java.base/share/classes/java/lang/Character.java
54 int initialCapacity = (int)(638 / 0.75f + 1.0f);
55
56 OptimalCapacity.ofHashMap(Character.UnicodeBlock.class,
57 "map", initialCapacity);
58 }
59 }
|
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 8080535 8191410 8215194
27 * @summary Expected size of Character.UnicodeBlock.map is not optimal
28 * @library /test/lib
29 * @modules java.base/java.lang:open
30 * java.base/java.util:open
31 * @build jdk.test.lib.util.OptimalCapacity
32 * @run main OptimalMapSize
33 */
34
35 import java.lang.reflect.Field;
36 import jdk.test.lib.util.OptimalCapacity;
37
38 // What will be the number of the Unicode blocks in the future.
39 //
40 // According to http://www.unicode.org/versions/Unicode7.0.0/ ,
41 // in Unicode 7 there will be added 32 new blocks (96 with aliases).
42 // According to http://www.unicode.org/versions/beta-8.0.0.html ,
43 // in Unicode 8 there will be added 10 more blocks (30 with aliases).
44 //
45 // After implementing support of Unicode 9 and 10 in Java, there will
46 // be 638 entries in Character.UnicodeBlock.map.
47 //
48 // As of Unicode 11, 667 entries are expected.
49 //
50 // Initialization of the map and this test will have to be adjusted
51 // accordingly then.
52 //
53 // Note that HashMap's implementation aligns the initial capacity to
54 // a power of two size, so it will end up 1024 (and thus succeed) in
55 // cases, such as 638 and 667.
56
57 public class OptimalMapSize {
58 public static void main(String[] args) throws Throwable {
59 // The initial size of Character.UnicodeBlock.map.
60 // See src/java.base/share/classes/java/lang/Character.java
61 Field f = Character.UnicodeBlock.class.getDeclaredField("MAP_CAPACITY");
62 f.setAccessible(true);
63 int initialCapacity = f.getInt(null);
64 assert initialCapacity == (int)(667 / 0.75f + 1.0f);
65
66 OptimalCapacity.ofHashMap(Character.UnicodeBlock.class,
67 "map", initialCapacity);
68 }
69 }
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