Inheritance: Object Class

• Object Class: every class descendant of Object class
• Not over-ridable Object methods:

  getClass(): runtime representation of the class of the object; returns class name, superclass, interfaces implemented by the class
  
  notify(), notifyAll(), wait(): thread synchronization control; concurrent processes; active
  

• Over-ridable Object methods:

  clone(), equals(), finalize(), toString(), hashCode()