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What is main difference between abstract class and interface in java?
abstract-classes
interfaces
0 Votes
2 Answers
28th Aug 2017, 3:29 PM
Swetha Srilakshmi
What is the difference between abstract and interface in java ?!
java
0 Votes
2 Answers
16th Dec 2016, 10:01 AM
Dalia Sharif
Why do we use abstract classes if we have the Normal ones....??
abstract
help
in
plz
python
1 Vote
1 Answer
27th Jun 2021, 3:45 PM
Manish Patel
Abstract classes can not be instantiated, but does it have constructor?
abstract-classes
c#
0 Votes
1 Answer
13th Jun 2017, 5:54 PM
Kundan
have you ever used interface in your project???
abstract
interface
java
4 Votes
8 Answers
6th Mar 2017, 4:45 PM
Somnath Ghosh
Why are constructors allowed in an abstract classes if it cannot be instantiated?
abstract-classes
c#
constructors
oop
1 Vote
1 Answer
14th Jul 2019, 12:25 PM
Rohan Rao
How to use an abstract class and one concrete class be extending in other concrete class
java
0 Votes
7 Answers
11th Apr 2018, 1:25 PM
Dispssin SP
please anyone can clarify the concept of abstract class and interfaces in detail plz
abstract-classes
java
0 Votes
4 Answers
5th Nov 2016, 2:43 PM
Mumtaz Hayat
Hi! I'm a bit confused. So why to use abstract despite of virtual?
abstract-classes
c#
1 Vote
2 Answers
14th Apr 2016, 6:09 AM
Andrei David
In java android i d'ont understand what is @override and what is the abstract
android
java
kotlin
1 Vote
2 Answers
16th Sep 2018, 1:46 PM
Hamza Adaoud
in java.awt package Graphics is an abstract class so how we can create the Graphics class object and call the methods.
java
9 Votes
8 Answers
7th Nov 2019, 10:21 AM
Saroj Patel
Say that I'm wrong, but I'm sure you can instanciate abstract classes
abstract-classes
-1 Vote
1 Answer
18th Oct 2018, 6:46 PM
Keheck
I am wondering where to learn the generic type and abstract class in java
java
robotic
0 Votes
2 Answers
8th Nov 2018, 9:49 PM
frank tong
whether the nested interface has 3 types:interface within a interface, interface within a class,interface within a abstract cls
interfaces
java
1 Vote
6 Answers
13th Sep 2020, 5:27 PM
Pàví(◠‿・)—☆
What is the need of interface, if the work done by interface ..can also be done by an abstract class?
interfaces
java
2 Votes
6 Answers
13th Aug 2019, 7:07 PM
Arpita Jha
Can anyone please tell why abstract classes are faster in implementing than interfaces.
abstraction
java
0 Votes
1 Answer
18th Jun 2018, 8:22 PM
Dhruv Walia
What is the distinction between an abstract data type and implementation of data type
help
me
please
0 Votes
1 Answer
30th Sep 2022, 12:18 PM
Meek jeez
Can someone please factorize these 2 classes with an abstract class ? And changing them accordingly?
abstract
abstract-classes
factorize
java
methods
overriding
0 Votes
2 Answers
16th Dec 2019, 8:17 PM
AdL
Why we create abstract method insted of normal method? At the first place
abstract-classes
codind
java
0 Votes
1 Answer
18th Jul 2017, 2:55 AM
lzy gyz
I have 3 question about C++(continue)
abstract
c++
function
3 Votes
3 Answers
5th Aug 2017, 10:07 AM
Yusuf
why we cannot write constructor in interface? while we can write constructor in abstract class?
abstract
can
cannot
class?
constructor
in
interface?
we
while
why
write
0 Votes
1 Answer
21st Mar 2018, 1:49 PM
Prathamesh Dhuri
Is PrintStream class a absract class??
abstract
java
printstream
2 Votes
3 Answers
9th Aug 2018, 7:20 AM
ARNAB KUMAR DAS
Can you please explain how to use an abstract class because i cannot initialize it.
abstract-classes
java
0 Votes
3 Answers
2nd Jun 2017, 4:29 AM
DoubleVermine
Can we call a constructor of parent most abstract class from a child most class?
java
1 Vote
2 Answers
28th May 2017, 6:01 PM
Pradyumna Kumar Barik
So when do we use virtual methods and when do we use abstract classes?
c#
inheritance
0 Votes
1 Answer
26th Jul 2016, 2:03 PM
Ihusaan Ahmed
Hi everybody , please what is differnce between abstract class and interface and how to choose the usefull one
java
0 Votes
4 Answers
10th Jul 2021, 7:22 AM
Abdul Jalil
[SOLVED]: AbstractCollection
abstract
abstractcollection
abstractlist
abstractmap
abstractset
16 Votes
3 Answers
15th Nov 2020, 7:04 AM
Chris Ng
How is it possible for the abstract class Calendar to have a method that return its instance?
abstract-classes
calendar
0 Votes
3 Answers
22nd Mar 2021, 5:41 PM
Allan Jackson
Create an abstract class called "Animal" and four derived classes Cow, Horse, Tiger, and Lamb.
abstract-classes
c++
member-funtion
-1 Vote
1 Answer
20th Nov 2020, 12:14 PM
Something New
Anybody else thinks that the information on sololearn is presented in an overly dry, complicated and abstract manner?
sololearn
0 Votes
5 Answers
30th Aug 2017, 5:05 PM
yves R
what's wrong in the codes
abstract
interface
java
1 Vote
3 Answers
24th Apr 2017, 11:46 AM
shobhit
I do not clearly undurstand abstract classes in Java programming Language. I just want to see one concrete example to understant
abstract-classes
java
2 Votes
7 Answers
10th Jul 2017, 11:20 PM
Stephcyrille
Why do we use abstract method when we can directly declare normally.i cant see the difference
abstract-classes
0 Votes
2 Answers
12th Feb 2019, 11:30 PM
chanukya mahidhar
Purpose of Abstract?
abstract
abstract-classes
beginner
kotlin
1 Vote
5 Answers
17th Dec 2022, 9:55 PM
William Owens
can someone tell me how to use abstract class and not how to make them please
abstract-classes
c#
1 Vote
2 Answers
2nd Jun 2017, 4:32 AM
DoubleVermine
About virtual and abstract : Why does the repair-method display "Repair a sportbike " ?
c#
override
virtual
1 Vote
1 Answer
1st Jan 2018, 9:41 PM
sneeze
How select rows from table SQL same names in one column in python code? in abstract form names.
python3
sql
0 Votes
3 Answers
25th Oct 2021, 1:45 PM
Evgeniy Nartov
What is the difference between list,tuple,dictionaries in real time.I don't need abstract answer.How do I know which one to use?
python
0 Votes
6 Answers
8th Jun 2017, 7:34 PM
phani indra
what is the point in abstract classed? what can they do to help me? when should i use them?
abstract-classes
java
4 Votes
2 Answers
5th Apr 2017, 6:11 PM
PaperGami T.
Is abstract classes are necessary when there is an option called interface is available in java?
abstract-classes
classes
compiler
interfaces
java
0 Votes
2 Answers
26th Jul 2018, 3:59 AM
viki
All interface methods are implicitly
abstract
final
private
protected
public
5 Votes
5 Answers
27th Apr 2019, 4:19 AM
Charitha Sri
Write a java program which includes the inheritance, Super keyword, Method Overloading, Method Overriding concept, Abstract k
java
-3 Votes
3 Answers
12th Aug 2021, 7:36 PM
Sumukh Gk
how to call non static methods that are already in abstract class inside main class static method in java?
abstract
class
coding
java
methodcalling
non-static
programming
static
1 Vote
2 Answers
1st Mar 2020, 6:36 AM
D ̲E ̲S ̲S ̲I ̲E ̲- ̲B ̲A ̲H ̲I ̲R ̲U ̲
What is the purpose of abstract class. Explanation needed with real world example. The scenario where it is used.
abstract-classes
0 Votes
3 Answers
1st Jun 2018, 2:52 AM
RamaLakshmi Moorthi
For java intermediate, in abstract classes, I cannot complete the practice assignment even though I checked the solutions.
java
0 Votes
1 Answer
17th Aug 2023, 7:09 PM
Mario Reategui
What is the use of this abstract method? If it doesn't do anything, why not just defining it in the subclasses?
abstract-classes
java
3 Votes
4 Answers
9th Aug 2016, 4:52 PM
Oliver Kratz-Lieber
I read abstract classes cannot be instantiated.But I cant understand it without example. Can anyone explain this line?
java
0 Votes
1 Answer
8th Aug 2019, 5:50 AM
Geek
A class that is used to manipulate data elements as objects. A. Primitive B. Wrapper C. Abstract D. String
java
1 Vote
3 Answers
21st Aug 2016, 11:51 AM
Nardz
"To use an abstract class, you have to inherit it from another class" I donot understand the meaning of this sentence
abstract-classes
2 Votes
2 Answers
25th Jun 2018, 10:35 AM
Tom
If we define a class as abstract, then it class must contains AT LEAST ONE SINGLE ABSTRACT METHOD THAT MUST BE IMPLEMENTED.
abstract
class
definition
java
0 Votes
1 Answer
24th Jun 2023, 1:40 AM
Oliver Pasaribu
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