9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.lang;
27
28 import jdk.internal.misc.CDS;
29 import jdk.internal.vm.annotation.IntrinsicCandidate;
30 import jdk.internal.vm.annotation.Stable;
31
32 import java.lang.constant.Constable;
33 import java.lang.constant.DynamicConstantDesc;
34 import java.util.Optional;
35
36 import static java.lang.constant.ConstantDescs.BSM_EXPLICIT_CAST;
37 import static java.lang.constant.ConstantDescs.CD_int;
38 import static java.lang.constant.ConstantDescs.CD_short;
39 import static java.lang.constant.ConstantDescs.DEFAULT_NAME;
40
41 /**
42 * The {@code Short} class wraps a value of primitive type {@code
43 * short} in an object. An object of type {@code Short} contains a
44 * single field whose type is {@code short}.
45 *
46 * <p>In addition, this class provides several methods for converting
47 * a {@code short} to a {@code String} and a {@code String} to a
48 * {@code short}, as well as other constants and methods useful when
49 * dealing with a {@code short}.
50 *
51 * <p>This is a <a href="{@docRoot}/java.base/java/lang/doc-files/ValueBased.html">value-based</a>
52 * class; programmers should treat instances that are
53 * {@linkplain #equals(Object) equal} as interchangeable and should not
54 * use instances for synchronization, or unpredictable behavior may
55 * occur. For example, in a future release, synchronization may fail.
56 *
57 * @author Nakul Saraiya
58 * @author Joseph D. Darcy
59 * @see java.lang.Number
60 * @since 1.1
61 */
62 @jdk.internal.ValueBased
63 public final class Short extends Number implements Comparable<Short>, Constable {
64
65 /**
66 * A constant holding the minimum value a {@code short} can
67 * have, -2<sup>15</sup>.
68 */
69 public static final short MIN_VALUE = -32768;
70
71 /**
72 * A constant holding the maximum value a {@code short} can
73 * have, 2<sup>15</sup>-1.
74 */
75 public static final short MAX_VALUE = 32767;
76
77 /**
78 * The {@code Class} instance representing the primitive type
79 * {@code short}.
80 */
81 @SuppressWarnings("unchecked")
256 }
257 }
258
259 /**
260 * Returns a {@code Short} instance representing the specified
261 * {@code short} value.
262 * If a new {@code Short} instance is not required, this method
263 * should generally be used in preference to the constructor
264 * {@link #Short(short)}, as this method is likely to yield
265 * significantly better space and time performance by caching
266 * frequently requested values.
267 *
268 * This method will always cache values in the range -128 to 127,
269 * inclusive, and may cache other values outside of this range.
270 *
271 * @param s a short value.
272 * @return a {@code Short} instance representing {@code s}.
273 * @since 1.5
274 */
275 @IntrinsicCandidate
276 public static Short valueOf(short s) {
277 final int offset = 128;
278 int sAsInt = s;
279 if (sAsInt >= -128 && sAsInt <= 127) { // must cache
280 return ShortCache.cache[sAsInt + offset];
281 }
282 return new Short(s);
283 }
284
285 /**
286 * Decodes a {@code String} into a {@code Short}.
287 * Accepts decimal, hexadecimal, and octal numbers given by
288 * the following grammar:
289 *
290 * <blockquote>
291 * <dl>
292 * <dt><i>DecodableString:</i>
293 * <dd><i>Sign<sub>opt</sub> DecimalNumeral</i>
294 * <dd><i>Sign<sub>opt</sub></i> {@code 0x} <i>HexDigits</i>
295 * <dd><i>Sign<sub>opt</sub></i> {@code 0X} <i>HexDigits</i>
|
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.lang;
27
28 import jdk.internal.misc.CDS;
29 import jdk.internal.value.DeserializeConstructor;
30 import jdk.internal.vm.annotation.IntrinsicCandidate;
31 import jdk.internal.vm.annotation.Stable;
32
33 import java.lang.constant.Constable;
34 import java.lang.constant.DynamicConstantDesc;
35 import java.util.Optional;
36
37 import static java.lang.constant.ConstantDescs.BSM_EXPLICIT_CAST;
38 import static java.lang.constant.ConstantDescs.CD_short;
39 import static java.lang.constant.ConstantDescs.DEFAULT_NAME;
40
41 /**
42 * The {@code Short} class wraps a value of primitive type {@code
43 * short} in an object. An object of type {@code Short} contains a
44 * single field whose type is {@code short}.
45 *
46 * <p>In addition, this class provides several methods for converting
47 * a {@code short} to a {@code String} and a {@code String} to a
48 * {@code short}, as well as other constants and methods useful when
49 * dealing with a {@code short}.
50 *
51 * <p>This is a <a href="{@docRoot}/java.base/java/lang/doc-files/ValueBased.html">value-based</a>
52 * class; programmers should treat instances that are
53 * {@linkplain #equals(Object) equal} as interchangeable and should not
54 * use instances for synchronization, or unpredictable behavior may
55 * occur. For example, in a future release, synchronization may fail.
56 *
57 * @author Nakul Saraiya
58 * @author Joseph D. Darcy
59 * @see java.lang.Number
60 * @since 1.1
61 */
62 @jdk.internal.MigratedValueClass
63 @jdk.internal.ValueBased
64 public final class Short extends Number implements Comparable<Short>, Constable {
65
66 /**
67 * A constant holding the minimum value a {@code short} can
68 * have, -2<sup>15</sup>.
69 */
70 public static final short MIN_VALUE = -32768;
71
72 /**
73 * A constant holding the maximum value a {@code short} can
74 * have, 2<sup>15</sup>-1.
75 */
76 public static final short MAX_VALUE = 32767;
77
78 /**
79 * The {@code Class} instance representing the primitive type
80 * {@code short}.
81 */
82 @SuppressWarnings("unchecked")
257 }
258 }
259
260 /**
261 * Returns a {@code Short} instance representing the specified
262 * {@code short} value.
263 * If a new {@code Short} instance is not required, this method
264 * should generally be used in preference to the constructor
265 * {@link #Short(short)}, as this method is likely to yield
266 * significantly better space and time performance by caching
267 * frequently requested values.
268 *
269 * This method will always cache values in the range -128 to 127,
270 * inclusive, and may cache other values outside of this range.
271 *
272 * @param s a short value.
273 * @return a {@code Short} instance representing {@code s}.
274 * @since 1.5
275 */
276 @IntrinsicCandidate
277 @DeserializeConstructor
278 public static Short valueOf(short s) {
279 final int offset = 128;
280 int sAsInt = s;
281 if (sAsInt >= -128 && sAsInt <= 127) { // must cache
282 return ShortCache.cache[sAsInt + offset];
283 }
284 return new Short(s);
285 }
286
287 /**
288 * Decodes a {@code String} into a {@code Short}.
289 * Accepts decimal, hexadecimal, and octal numbers given by
290 * the following grammar:
291 *
292 * <blockquote>
293 * <dl>
294 * <dt><i>DecodableString:</i>
295 * <dd><i>Sign<sub>opt</sub> DecimalNumeral</i>
296 * <dd><i>Sign<sub>opt</sub></i> {@code 0x} <i>HexDigits</i>
297 * <dd><i>Sign<sub>opt</sub></i> {@code 0X} <i>HexDigits</i>
|