1 /*
 2  * Copyright (c) 1994, 2020, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 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 package java.lang;
25 
26 import jdk.internal.vm.annotation.IntrinsicCandidate;
27 
28 /**
29  * Slightly modified version of java.lang.Object that replaces
30  * finalize() by finalizeObject() to avoid overriding in subclasses.
31  */
32 public class Object {
33 
34     @IntrinsicCandidate
35     public Object() {}
36 
37     @IntrinsicCandidate
38     public final native Class<?> getClass();
39 
40     @IntrinsicCandidate
41     public native int hashCode();
42 
43     public boolean equals(Object obj) {
44         return (this == obj);
45     }
46 
47     @IntrinsicCandidate
48     protected native Object clone() throws CloneNotSupportedException;
49 
50     public String toString() {
51         return getClass().getName() + "@" + Integer.toHexString(hashCode());
52     }
53 
54     @IntrinsicCandidate
55     public final native void notify();
56 
57     @IntrinsicCandidate
58     public final native void notifyAll();
59 
60     private final native void wait0(long timeout) throws InterruptedException;
61 
62     public final void wait(long timeout) throws InterruptedException {
63         wait0(timeout);
64     }
65 
66     public final void wait(long timeout, int nanos) throws InterruptedException {
67         if (timeout < 0) {
68             throw new IllegalArgumentException("timeout value is negative");
69         }
70 
71         if (nanos < 0 || nanos > 999999) {
72             throw new IllegalArgumentException(
73                                 "nanosecond timeout value out of range");
74         }
75 
76         if (nanos >= 500000 || (nanos != 0 && timeout == 0)) {
77             timeout++;
78         }
79 
80         wait0(timeout);
81     }
82 
83     public final void wait() throws InterruptedException {
84         wait0(0);
85     }
86 
87     /**
88      * Replaces original finalize() method and is therefore not
89      * overridden by any subclasses of Object.
90      * @throws Throwable
91      */
92     // protected void finalize() throws Throwable { }
93     public void finalizeObject() throws Throwable { }
94 }