gcc/libjava/java/lang/Object.java

// Object.java - The root of all evil.

/* Copyright (C) 1998, 1999  Cygnus Solutions

   This file is part of libgcj.

This software is copyrighted work licensed under the terms of the
Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
details.  */

package java.lang;

/**
 * @author Tom Tromey <tromey@cygnus.com>
 * @date September 30, 1998 
 */

/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
 * "The Java Language Specification", ISBN 0-201-63451-1
 * plus online API docs for JDK 1.2 beta from http://www.javasoft.com.
 * plus gcj compiler sources (to determine object layout)
 * Status:  Complete to version 1.1
 */

public class Object
{
  // This must come first.  See _JvObjectPrefix in Object.h.
  protected void finalize () throws Throwable
  {
  }

  public final native Class getClass ();
  public native int hashCode ();
  public final native void notify ();
  public final native void notifyAll ();
  public final native void wait (long timeout, int nanos)
    throws InterruptedException;

  public boolean equals (Object obj)
  {
    return this == obj;
  }

  public Object ()
  {
  }

  public String toString ()
  {
    return getClass().getName() + '@' + Integer.toHexString(hashCode());
  }

  public final void wait () throws InterruptedException
  {
    wait (0, 0);
  }

  public final void wait (long timeout) throws InterruptedException
  {
    wait (timeout, 0);
  }

  protected native Object clone () throws CloneNotSupportedException;

  // This initializes the sync_info member.  It is here for
  // completeness (some day we'll be able to auto-generate Object.h).
  private final native void sync_init ();

  // This exists as a workaround for the fact that we can't catch a
  // Java Exception from C++.  This is from section 12.6 of the Java
  // Language Spec.  FIXME: remove this once exception processing
  // works.
  private static final void hack12_6 (Object f)
  {
    try
      {
	f.finalize();
      }
    catch (Throwable x)
      {
      }
  }

  // Note that we don't mention the sync_info field here.  If we do,
  // jc1 will not work correctly.
}