25
26 package java.lang;
27
28 /**
29 * Class {@code Object} is the root of the class hierarchy.
30 * Every class has {@code Object} as a superclass. All objects,
31 * including arrays, implement the methods of this class.
32 *
33 * @author unascribed
34 * @see java.lang.Class
35 * @since 1.0
36 */
37 public class Object {
38
39 private static native void registerNatives();
40 static {
41 registerNatives();
42 }
43
44 /**
45 * Returns the runtime class of this {@code Object}. The returned
46 * {@code Class} object is the object that is locked by {@code
47 * static synchronized} methods of the represented class.
48 *
49 * <p><b>The actual result type is {@code Class<? extends |X|>}
50 * where {@code |X|} is the erasure of the static type of the
51 * expression on which {@code getClass} is called.</b> For
52 * example, no cast is required in this code fragment:</p>
53 *
54 * <p>
55 * {@code Number n = 0; }<br>
56 * {@code Class<? extends Number> c = n.getClass(); }
57 * </p>
58 *
59 * @return The {@code Class} object that represents the runtime
60 * class of this object.
61 * @jls 15.8.2 Class Literals
62 */
63 public final native Class<?> getClass();
64
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25
26 package java.lang;
27
28 /**
29 * Class {@code Object} is the root of the class hierarchy.
30 * Every class has {@code Object} as a superclass. All objects,
31 * including arrays, implement the methods of this class.
32 *
33 * @author unascribed
34 * @see java.lang.Class
35 * @since 1.0
36 */
37 public class Object {
38
39 private static native void registerNatives();
40 static {
41 registerNatives();
42 }
43
44 /**
45 * Constructs a new object.
46 */
47 public Object() {}
48
49 /**
50 * Returns the runtime class of this {@code Object}. The returned
51 * {@code Class} object is the object that is locked by {@code
52 * static synchronized} methods of the represented class.
53 *
54 * <p><b>The actual result type is {@code Class<? extends |X|>}
55 * where {@code |X|} is the erasure of the static type of the
56 * expression on which {@code getClass} is called.</b> For
57 * example, no cast is required in this code fragment:</p>
58 *
59 * <p>
60 * {@code Number n = 0; }<br>
61 * {@code Class<? extends Number> c = n.getClass(); }
62 * </p>
63 *
64 * @return The {@code Class} object that represents the runtime
65 * class of this object.
66 * @jls 15.8.2 Class Literals
67 */
68 public final native Class<?> getClass();
69
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