Prev Next

Java / Inheritance

Benefits of covariant return type in Java.

It eliminates unnecessary downcasting from the super type to the subtype. For example object clone method can be overriden by implementing Clonable interface and the implementing class return the object of its own type while the object clone method returns object type.

It's right time to invest in Cryptocurrencies Dogecoin! Earn free bitcoins up to $250 now by signing up.

Earn bitcoins upto $250 (free), invest in other Cryptocurrencies when you signup with blockfi. Use the referral link: Signup now and earn!

Using BlockFi, don't just buy crypto - start earning on it. Open an interest account with up to 8.6% APY, trade currencies, or borrow money without selling your assets.

Join CoinBase! We'll both receive $10 in free Bitcoin when they buy or sell their first $100 on Coinbase! Available in India also. Use the referral Join coinbase!

Invest now!!! Get Free equity stock (US, UK only)!

Use Robinhood app to invest in stocks. It is safe and secure. Use the Referral link to claim your free stock when you sign up!.

The Robinhood app makes it easy to trade stocks, crypto and more.

Webull! Receive free stock by signing up using the link: Webull signup.

More Related questions...

What are the differences between composition and inheritance in Java? Are static members inherited to sub classes? What happens if the parent and the child class have a field with same identifier? Are constructors and initializers also inherited to sub classes? How do you restrict a member of a class from inheriting by its sub classes? How do you implement multiple inheritance in java? How Inheritance is implemented in java? Types of inheritance. Can a class extend by itself in Java? Can we reduce the visibility of the inherited or overridden method? How do you override a private method in java? When to overload a method in Java and when to override it? What is the order of extends and implements keyword on Java class declaration? How do you prevent overriding a Java method without using the final modifier? Explain covariant method overriding in Java. What is covariant return type in Java? Benefits of covariant return type in Java. What are the rules of method overriding in Java? Difference between method overriding and overloading in Java. What is Virtual method/function in Java? How to prevent using overloading instead of overriding by mistake? Difference between Inheritance and Encapsulation. What happens when a class implements two interfaces and both have a method with same name and signature? What happens when a class implements two interfaces and both declare field (variable) with same name? Can a subclass instance method override a superclass static method? Can a subclass static method hide superclass instance method? What is method hiding in Java? Can we pass an object of a subclass to a method expecting an object of the superclass? Can a superclass access subclass members?
Show more question and Answers...

Java Identifiers

Comments & Discussions

Interviews Questions

About Javapedia.net

Javapedia.net is for Java and J2EE developers, technologist and college students who prepare of interview. Also this site includes many practical examples.

This site is developed using J2EE technologies by Steve Antony, a senior Developer/lead at one of the logistics based company.

contact: javatutorials2016[at]gmail[dot]com

Kindly consider donating for maintaining this website. Thanks.

Copyright © 2020, javapedia.net, all rights reserved. privacy policy.

DMCA.com Protection Status