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

Is it possible to learn java at home without coaching in one month?
It all depends on you. If you are already aware of programming then it is definetly possible to learn java at home. But if learn through a tutor then you can learn easily.
Pritom
0 0
5
Is it good to go for a Java coaching center and learn Java (with advanced Java) to improve my programming skills?
yes, Please check the Institute reviews and discuss with the tutor, what topics were covered in class. Ask about the practicals session and how many hours/duration of the course.
Gerda
0 0
5
What is selection sort in java?
The selection sort is a combination of searching and sorting. During each pass, the unsorted element with the smallest (or largest) value is moved to its proper position in the array. The number of times...
Snehashis
What is an Exception in Java?
We can Say Exception is an event which terminates the normal execution of a program
Piyush
0 0
5
If a class contains only a private constructor and no other constructor, is it possible to create object of that class? If yes how?
Yes, It is possible. But, Object can be created only with in that class (either in any method or block).
Shabbir

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

Ask a Question

Related Lessons

Comparable vs Comparator
java.lang.Comparable java.util.Comparator For comparing some other object with its own object. Ex. I am comparing myself to some other employee. Method signature is: int compareTo (T object). For...

Vivek R.

1 0
0
Mastering in Java Programming
Core java topics What is Java?Execution Model Of JavaBytecodeHow to Get Java?A First Java ProgramCompiling and Interpreting ApplicationsThe JDK Directory StructureUsing Eclipse Data types and Variables What...

Rajeev Majumdar

1 0
0
Java : Compile-time Versus Runtime optimization
While designing and development, one should think in terms of compile-time and run-time.It helps in understanding language basics in a better way.Let's understand this with a question below : What...
S

Surinder Pal Singh

1 0
0
Be prepared to get trained--init
Before starting the training,students must be mentally prepared for acceptance of new knowledge. Students must attend training with open minded forgetting the position they are working.This will help...
S

Smartnub Softsolutions

0 0
0
2.1. Reverse a singly linked list.
class Node { int data; Node next; Node(int data) { this.data = data; this.next = null; }} public class LinkedList { Node head; public void reverse() { Node prev = null; Node curr = head; Node next =...

Vivek J.

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