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.HotSpotIntrinsicCandidate;
29
30 /**
31 * Class {@code Object} is the root of the class hierarchy.
32 * Every class has {@code Object} as a superclass. All objects,
33 * including arrays, implement the methods of this class.
34 *
35 * @author unascribed
36 * @see java.lang.Class
37 * @since 1.0
38 */
39 public class Object {
40
41 private static native void registerNatives();
42 static {
43 registerNatives();
44 }
45
46 /**
47 * Constructs a new object.
48 */
49 @HotSpotIntrinsicCandidate
50 public Object() {}
51
52 /**
53 * Returns the runtime class of this {@code Object}. The returned
54 * {@code Class} object is the object that is locked by {@code
55 * static synchronized} methods of the represented class.
56 *
57 * <p><b>The actual result type is {@code Class<? extends |X|>}
58 * where {@code |X|} is the erasure of the static type of the
59 * expression on which {@code getClass} is called.</b> For
60 * example, no cast is required in this code fragment:</p>
61 *
62 * <p>
63 * {@code Number n = 0; }<br>
64 * {@code Class<? extends Number> c = n.getClass(); }
65 * </p>
|
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.HotSpotIntrinsicCandidate;
29
30 /**
31 * Class {@code Object} is the root of the class hierarchy.
32 * Every class has {@code Object} as a superclass. All objects,
33 * including arrays, implement the methods of this class.
34 *
35 * @author unascribed
36 * @see java.lang.Class
37 * @since 1.0
38 */
39 public class Object {
40
41 /**
42 * Constructs a new object.
43 */
44 @HotSpotIntrinsicCandidate
45 public Object() {}
46
47 /**
48 * Returns the runtime class of this {@code Object}. The returned
49 * {@code Class} object is the object that is locked by {@code
50 * static synchronized} methods of the represented class.
51 *
52 * <p><b>The actual result type is {@code Class<? extends |X|>}
53 * where {@code |X|} is the erasure of the static type of the
54 * expression on which {@code getClass} is called.</b> For
55 * example, no cast is required in this code fragment:</p>
56 *
57 * <p>
58 * {@code Number n = 0; }<br>
59 * {@code Class<? extends Number> c = n.getClass(); }
60 * </p>
|