Name all methods of class java.lang.Object

This question is often used as a way to start a conversation—it can lead to a deep dive into most methods discussed. First and foremost, it is important to remember the signatures—not knowing the answers to questions about these methods, one can at least reason from them. It's also useful to open the source code and carefully read the Javadoc documentation. Let's proceed as in an interview, and examine each of these methods in detail. Here's the list:

• public final native Class getClass()
• public native int hashCode()
• public boolean equals(Object obj)
• protected native Object clone() throws CloneNotSupportedException
• public String toString()
• public final native void notify()
• public final native void notifyAll()
• public final native void wait(long timeout) throws InterruptedException
• public final void wait(long timeout, int nanos) throws InterruptedException
• public final void wait() throws InterruptedException
• protected void finalize() throws Throwable