what is Object Class in java

Java provides a special class called “Object” class that is available in java.lang package.  It is the super class of all other classes.  So, a reference variable of type Object is created, it refers to object of any other class.  Object class defines the following methods that are available in every object.

                        Method                                                           Purpose

            Object clone( )                                                Creates a new object that is the same as the

                                                                        object being cloned

            boolean equals(Object object)             Determines whether one object is equal to

                                                                        another

            void finalize( )                                     Called before an unused object is recycled

            Class getClass( )                                  Obtains the class of an object at run time

            int hashCode( )                                   Returns the hash code associated with the

                                                                        invoking object

            void notify( )                                       Resumes execution of a thread waiting on

                                                                        the invoking object

            void notifyAll( )                                  Resumes execution of all threads waiting

                                                                        on the invoking object

            String toString( )                                 Returns a string that describes the object

            void wait( )                                         Waits on another thread of execution

            void wait(long milliseconds)

            void wait(long milliseconds, int nanoseconds)