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 /**

    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     private static native void registerNatives();

    35     static {

    36         registerNatives();

    37     }

    38 

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

    40 

    41     public native int hashCode();

    42 

    43     public boolean equals(Object obj) {

    44         return (this == obj);

    45     }

    46 

    47     protected native Object clone() throws CloneNotSupportedException;

    48 

    49     public String toString() {

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

    51     }

    52 

    53     public final native void notify();

    54 

    55     public final native void notifyAll();

    56 

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

    58 

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

    60         if (timeout < 0) {

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

    62         }

    63 

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

    65             throw new IllegalArgumentException(

    66                                 "nanosecond timeout value out of range");

    67         }

    68 

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

    70             timeout++;

    71         }

    72 

    73         wait(timeout);

    74     }

    75 

    76     public final void wait() throws InterruptedException {

    77         wait(0);

    78     }

    79 

    80     /**

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

    82      * overridden by any subclasses of Object.

    83      * @throws Throwable

    84      */

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

    86     public void finalizeObject() throws Throwable { }

    87 }