Can a class have interface and vice-versa?

Asked by Last Modified  

7 Answers

Learn Java

Follow 0
Answer

Please enter your answer

Suprio Dutta

Tutor

Interface is used to support multiple inheritance only.
Comments
Dislike Bookmark

Talent with Professional Experience

No a class cannot have interface. But vice versa is true
Comments
Dislike Bookmark

Software Testing Trainer(Automation)

how its possible both has different meaning you cant enclosed it
Comments
Dislike Bookmark

12 years of MNC company work experience on java ,J2ee technologies

Yes.Class can have interface viceversa.
Comments
Dislike Bookmark

Trainer

I normally used this “What is the difference between an Abstract Class and an Interface” as a quick way to gauge someone. Lots of times, its the first or second question I will ask. I cannot tell you how many times people will mess this question up. 9 times out of 10, people read about it at some www.basicinterviewquestions.com...
read more
I normally used this “What is the difference between an Abstract Class and an Interface” as a quick way to gauge someone. Lots of times, its the first or second question I will ask. I cannot tell you how many times people will mess this question up. 9 times out of 10, people read about it at some www.basicinterviewquestions.com (not a real site hehe), giving the canned response of “You can define default functionality in an abstract class and you can just define functions in an interface”. The curve ball is thrown when you ask “Why would you use one over the other?”. That will earn you the ‘deer in headlights’ look. The other 1 out of 10 you will get a “I never had to use that so I don’t know”. At the top level, the are a few basic difference. Abstract classes allow for default default function definition. This means that whatever class extends the abstract class will have access to this. If we have a base class where all the classes will perform the same function, then we can define that in our Abstract class. An interface is a list of functions or properties that if a class implements it, it will have to have those functions defined within it. It is a situation of “Is-A” vs “Can-Do-this”. Objects that extends an Abstract class “Is-A” base class. Objects that implement “Can-Do-This”. Now if I asked this question and got the answer, yes, that would be the correct answer. However, I want to know why one would want to use an interface over an abstract class, and vice versa. read less
Comments
Dislike Bookmark

Trainer

No, a class cant have interfaces but it can implement interfaces. But viceversa is not true.
Comments
Dislike Bookmark

Core Java Training

Yes, 100% yes. A class can have an Interface and an Interface can have a class.
Comments
Dislike Bookmark

View 5 more Answers

Related Questions

Which language has the best future prospects: Python, Java, or JavaScript?
According to me, "Python" is the programming language having the best future prospect considering the current industry trend. Reason: Python is extensively used in advanced technologies such as Machine...
Atharva
0 0
5
class HappyGarbage01 { public static void main(String args[]) { HappyGarbage01 h = new HappyGarbage01(); h.methodA(); /* Line 6 */ } Object methodA() { Object obj1 = new Object(); Object [] obj2 = new Object[1]; obj2[0] = obj1; obj1 = null; return obj2[0]; } } Where will be the most chance of the garbage collector being invoked? A. After line 9 B. After line 10 C. After line 11 D. Garbage collector never invoked in methodA()
Hello Shrikant who told you that you can explicity call garbage collector. You cann't call gc explicity even when you use System.gc() it is not guranteed that gc will be invoked it is all up to JVM when...
Srikanth
Is JAVA training only for technical students or a non-technical student also may join?
Any Body can Learn Programming Language.It All depends upon the learning of basics and all.Basics actually makes the thing different.
Vikrant
0 0
6
What are the best books to learn Java?
you can buy any book to learn java but for beginner's Herber Schild is prefer best
Prashant
0 0
6
How to find a good Java coaching centre?
Its all depends on the trainer and his expertise. I would suggest you to get feedback from the students who already joined.
Abirami
1 0
6

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Java Overview
Java platform overview Java platform components The Java platform consists of the following components. The Java language Like any programming language, the Java language has its own structure, syntax...
A

Akshay Shende

0 0
0
Easy way to remember Java keyword.
ACCESS MODIFIER ACCESS SPECIFIER abstract, assert, const, final, native, static, strictfp, super, synchronized, this, transient, void, volatile public, private, protected, default DATA...

Rohit Deshbhratar

1 0
0
Write your first Python program in 10 minutes
1. Download python from python official site search "python download" in google 2. Install in your machine 3. verify using : "python --version" command 4. Write first program using notepad create...

Debrati Sadhu

1 0
0
10 Cool SQL Optimizations That Do Not Depend On The Cost Model
Today, we don’t want to talk about cost based optimisation, i.e. optimisations that depend on a database’s cost model. We’ll look into much simpler optimisations that can be implemented...

Hasnain

2 0
0
Final, Finally And Finalize In Java
Final: 1. It is a non access modifier that can be applied to variables,methods and to class. 2. Final means non-changable. Final variable: 1. If a variable is declared as final it can't be re-assigned. 2....

Md ajmat

0 0
0

Recommended Articles

Why Java is the Most Popular Programming Language

Designed in a flexible and user-friendly demeanor, Java is the most commonly used programming language for the creation of web applications and platform. It allows developers to “write once, run anywhere” (WORA). It is general-purpose, a high-level programming language developed by Sun Microsystem. Initially known as an...

Read full article >

Top 5 Reasons to Learn JavaScript

Before we start on the importance of learning JavaScript, let’s start with a short introduction on the topic. JavaScript is the most popular programming language in the world, precisely it is the language - for Computers, the Web, Servers, Smart Phone, Laptops, Mobiles, Tablets and more. And if you are a beginner or planning...

Read full article >

Java: An Object-Oriented Language

Java is the most commonly used popular programming language for the creation of web applications and platform today. Integrated Cloud Applications and Platform Services Oracle says, “Java developers worldwide has over 9 million and runs approximately 3 billion mobile phones”.  Right from its first implication as java 1.0...

Read full article >

Some Popular IT Courses in Current Market

In the domain of Information Technology, there is always a lot to learn and implement. However, some technologies have a relatively higher demand than the rest of the others. So here are some popular IT courses for the present and upcoming future: Cloud Computing Cloud Computing is a computing technique which is used...

Read full article >

Find Java Certification near you
Java Certification in Bangalore
Java Certification in Hyderabad
Java Certification in Pune
Java Certification in Chennai
Java Certification in Delhi
Java Certification in Mumbai
Java Certification in Kolkata
Java Certification in Noida
Java Certification in Gurgaon
Java Certification in Ghaziabad
Online Java Training

Looking for Java Training Classes?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you