A class that contains a pure virtual function is known as an abstract class. In the above example, the class Shape is an abstract class. We cannot create objects of an abstract class. However, we can derive classes from them, and use their data members and member functions (except pure virtual functions).
Read moreDo you know some methods in object class?
int hashCode() – Used to get a hash code value for the object. void notify() – Used to wake up a single thread that is waiting on this object’s monitor. void notifyAll() – Used to wake up all threads that are waiting on this object’s monitor. String toString() – Used to get a string representation of the object.6 Şub 2018
Read moreWhat are the methods of an object?
a method is an action which an object is able to perform . sending a message to an object means asking the object to execute or invoke one of its methods.
Read moreHow many methods are available in object class?
There are 11 methods in Object class .
Read moreWhich are the methods of object class?
Methods of Object class MethodDescriptionpublic int hashCode()returns the hashcode number for this object.public boolean equals(Object obj)compares the given object to this object.protected Object clone() throws CloneNotSupportedExceptioncreates and returns the exact copy (clone) of this object.Java Object Class – Javatpoint www.javatpoint.com › object-class
Read moreCan we use super in constructor in Java?
super() can be used to invoke immediate parent class constructor .
Read moreHow are this () and super () used with constructors?
How are this() and super() used with constructors? Constructors use this to refer to another constructor in the same class with a different parameter list . Constructors use super to invoke the superclass’s constructor. If a constructor uses super, it must use it in the first line; otherwise, the compiler will complain.
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