1 /*

     2  * Copyright (c) 1994, 2014, 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.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     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.HotSpotIntrinsicCandidate;

    29 

    30 /**

    31  * Slightly modified version of java.lang.Object that replaces

    32  * finalize() by finalizeObject() to avoid overriding in subclasses.

    33  */

    34 public class Object {

    35 

    36     @HotSpotIntrinsicCandidate

    37     public Object() {}

    38 

    39     private static native void registerNatives();

    40     static {

    41         registerNatives();

    42     }

    43 

    44     @HotSpotIntrinsicCandidate

    45     public final native Class<?> getClass();

    46 

    47     @HotSpotIntrinsicCandidate

    48     public native int hashCode();

    49 

    50     public boolean equals(Object obj) {

    51         return (this == obj);

    52     }

    53 

    54     @HotSpotIntrinsicCandidate

    55     protected native Object clone() throws CloneNotSupportedException;

    56 

    57     public String toString() {

    58         return getClass().getName() + "@" + Integer.toHexString(hashCode());

    59     }

    60 

    61     @HotSpotIntrinsicCandidate

    62     public final native void notify();

    63 

    64     @HotSpotIntrinsicCandidate

    65     public final native void notifyAll();

    66 

    67     public final native void wait(long timeout) throws InterruptedException;

    68 

    69     public final void wait(long timeout, int nanos) throws InterruptedException {

    70         if (timeout < 0) {

    71             throw new IllegalArgumentException("timeout value is negative");

    72         }

    73 

    74         if (nanos < 0 || nanos > 999999) {

    75             throw new IllegalArgumentException(

    76                                 "nanosecond timeout value out of range");

    77         }

    78 

    79         if (nanos >= 500000 || (nanos != 0 && timeout == 0)) {

    80             timeout++;

    81         }

    82 

    83         wait(timeout);

    84     }

    85 

    86     public final void wait() throws InterruptedException {

    87         wait(0);

    88     }

    89 

    90     /**

    91      * Replaces original finalize() method and is therefore not

    92      * overridden by any subclasses of Object.

    93      * @throws Throwable

    94      */

    95     // protected void finalize() throws Throwable { }

    96     public void finalizeObject() throws Throwable { }

    97 }