Fogo's answer 2020-09-10：
registerNatives：private+static.
getClass： Back here Object Runtime class for .
hashCode： Returns the hash code value of the object .
equals： Indicates whether some other object is associated with this object “ equal ”.
clone：protected. Create and return a copy of this object .
toString： Return to one String character string , Information used to describe the current object , It can be rewritten to return information that is useful to you , The default return is the class name of the current object +hashCode Of 16 Hexadecimal Numbers .
notify： Wake up a single thread waiting on this object monitor .
notifyAll： Wakes up all threads waiting on this object monitor .
wait(long timeout)： This object is called in another thread notify() Method or notifyAll() Method , Or before the specified amount of time , Causes the current thread to wait .
wait(long timeout, int nanos)： This object is called in another thread notify() Method or notifyAll() Method , Or some other thread breaks the current thread , Or has exceeded a certain actual amount of time before , Causes the current thread to wait .
wait： This object is called in another thread notify() Method or notifyAll() Before the method , Causes the current thread to wait .
finalize：protected. When the garbage collector determines that there are no more references to the object , This method is called by the object's garbage collector .