Lesson 21 - The equals() and clone() methods in Java

Java OOP The equals() and clone() methods in Java

In the previous lesson, Enumerated types and constants in Java, we went over the enumerated types and constants in Java. In today's tutorial, we're going to focus on the equals() method and introduce object cloning.

The equals() method

The equals() method is related to comparing objects. We already know that we use it to compare strings. The == operator works for primitive data types, such as int or


 

...End of the preview...

Premium article

Premium article

ict.social is a large database made up of manuals and tutorials, whose main goal is to provide high-quality IT education to everyone. We started out in the Czech republic, where we display roughly a million articles per month and receive plenty of gratitude from our users. Thanks to our successful establishment, we are now bringing these articles to the rest of the world.

Although we are trying to keep our content free of charge, maintaining the site is a huge effort for everyone involved. Therefore, some content (exercises and more advanced material) costs network points. Don't worry, they're really cheap :)

Article description

Requested article covers this content:

This tutorial explains differences between the equals() method and the == operator. We'll override hashCode() and learn to create shallow and deep clones.

Limited offer: Learn all knowledge and save money

Buy articles and tests separately one by one 100 points
Buy the course including all articles and features for an exclusive price 85 points
Currently, you have 0 points
By buying this exclusive package, you'll have access to all 27 articles in this course including exercise submitting while saving $1.35. This offer is limited for the first articles only with an additional exclusive 15% discount.
You gain 85 points for adding an article to the site, or for $9.00 $7.65

Buy just this article

Warning, by buying just this article you'll lose the limited 15% discount for the package of all the articles.

To access the article, you need 10 points
Currently, you have 0 points
You gain 10 points for adding an article to the site, or for $0.90

Buying this article gives you unlimited access to it forever. You will learn some more and help us keep giving our site maintenance which helps you and others get better futures. It's a win-win.

This article is licensed :Premium, by buying this article, you agree with the terms of use.

You gain points by supporting our network. This is done by sending a helpful amount of money to support the site, or by creating content for the network.

You can get points immediately using:

Credit card SMS Wire transfer
Credit card SMS Wire transfer

 

Article has been written for you by David Capka
Avatar
The author is a programmer, who likes web technologies and being the lead/chief article writer at ICT.social. He shares his knowledge with the community and is always looking to improve. He believes that anyone can do what they set their mind to.
Unicorn College The author learned IT at the Unicorn College - a prestigious college providing education on IT and economics.
Activities (4)