1 /* 2 * Copyright (c) 1994, 2018, 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.HotSpotIntrinsicCandidate; 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 @HotSpotIntrinsicCandidate 35 public Object() {} 36 37 private static native void registerNatives(); 38 static { 39 registerNatives(); 40 } 41 42 @HotSpotIntrinsicCandidate 43 public final native Class<?> getClass(); 44 45 @HotSpotIntrinsicCandidate 46 public native int hashCode(); 47 48 public boolean equals(Object obj) { 49 return (this == obj); 50 } 51 52 @HotSpotIntrinsicCandidate 53 protected native Object clone() throws CloneNotSupportedException; 54 55 public String toString() { 56 return getClass().getName() + "@" + Integer.toHexString(hashCode()); 57 } 58 59 @HotSpotIntrinsicCandidate 60 public final native void notify(); 61 62 @HotSpotIntrinsicCandidate 63 public final native void notifyAll(); 64 65 public final native void wait(long timeout) throws InterruptedException; 66 67 public final void wait(long timeout, int nanos) throws InterruptedException { 68 if (timeout < 0) { 69 throw new IllegalArgumentException("timeout value is negative"); 70 } 71 72 if (nanos < 0 || nanos > 999999) { 73 throw new IllegalArgumentException( 74 "nanosecond timeout value out of range"); 75 } 76 77 if (nanos >= 500000 || (nanos != 0 && timeout == 0)) { 78 timeout++; 79 } 80 81 wait(timeout); 82 } 83 84 public final void wait() throws InterruptedException { 85 wait(0); 86 } 87 88 /** 89 * Replaces original finalize() method and is therefore not 90 * overridden by any subclasses of Object. 91 * @throws Throwable 92 */ 93 // protected void finalize() throws Throwable { } 94 public void finalizeObject() throws Throwable { } 95 }