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 }