interface vs abstract class java Code Example

difference between abstract and interface

whatever by Thankful Tuatara on Nov 30 2020 Donate

4

Interface 
1) Interface contains only abstract methods 
2) Access Specifiers for methods in interface
must be public
3) Variables defined must be public , static ,
final
4) Multiple Inheritance in java is implemented
using interface
5) To implement an interface we use
implements keyword

Abstract Class
1) Abstract class can contain abstract methods,
concrete methods or both
2) Except private we can have any access
specifier for methods in abstract class.
3) Except private variables can have any access
specifiers
4)We cannot achieve multiple inheritance using
abstract class.
5)To implement an interface we use implements
keyword

abstract classes vs interfaces

whatever by The_simp_is_here13 on Dec 10 2020 Donate

1

Interface 
1) Interface contains only abstract methods 
2) Access Specifiers for methods in interface
must be public
3) Variables defined must be public , static ,
final
4) Multiple Inheritance in java is implemented
using interface
5) To implement an interface we use
implements keyword

Abstract Class
1) Abstract class can contain abstract methods,
concrete methods or both
2) Except private we can have any access
specifier for methods in abstract class.
3) Except private variables can have any access
specifiers
4)We cannot achieve multiple inheritance using
abstract class.
5)To implement an interface we use extends
keyword

abstract class vs interface

whatever by Obedient Ocelot on Dec 05 2020 Donate

1

Interfaces specify what a class must do and not how. 
It is the blueprint of the class.
It is used to achieve total abstraction. 

We are using implements keyword for interface.

Abstract Class
Sometimes we may come across a situation
where we cannot provide implementation to
all the methods in a class. We want to leave the 
implementation to a class that extends it.
  In such case we declare a class
as abstract.To make a class abstract
  we use key word abstract. 
1) Abstract class can contain abstract methods,
concrete methods or both
2) Except private we can have any access
specifier for methods in abstract class.
3) Except private variables can have any access
specifiers
4)We cannot achieve multiple inheritance using
abstract class.

interface vs abstract class java

java by Obedient Ocelot on Jan 05 2021 Donate

0

Interfaces specify what a class must do and not how. 
It is the blueprint of the class.
It is used to achieve total abstraction. 

We are using implements keyword for interface.
Let’s consider the example of vehicles like
bicycle, car, motorbike………, 
they have common functionalities.
So we make an interface and put all these
common functionalities.
And lets Bicycle, Bike, car ….etc implement
all these functionalities in their
own class in their own way.

Abstract Class
1) Abstract class can contain abstract methods,
concrete methods or both
2) Except private we can have any access
specifier for methods in abstract class.
3) Except private variables can have any access
specifiers
4)We cannot achieve multiple inheritance using
abstract class.

difference between interface and abstract class

whatever by Obedient Ocelot on Jan 05 2021 Donate

0

Interfaces specify what a class must do and not how. 
It is the blueprint of the class.
It is used to achieve total abstraction. 

We are using implements keyword for interface.
Let’s consider the example of vehicles like
bicycle, car, motorbike………, 
they have common functionalities.
So we make an interface and put all these
common functionalities.
And lets Bicycle, Bike, car ….etc implement
all these functionalities in their
own class in their own way.

Abstract Class
Sometimes we may come across a situation
where we cannot provide implementation to
all the methods in a class. We want to leave the 
implementation to a class that extends it.
  In such case we declare a class
as abstract.To make a class abstract
  we use key word abstract. 
1) Abstract class can contain abstract methods,
concrete methods or both
2) Except private we can have any access
specifier for methods in abstract class.
3) Except private variables can have any access
specifiers
4)We cannot achieve multiple inheritance using
abstract class.

how to use an abstract class in java

java by Nitbit25 on Jan 08 2020 Donate

0

interface methods{
    public void hey();
    public void bye();
}

//unable to implement all the abstract methods in the interface so 
// the other class automatically becomes abstract
abstract class other implements methods{
    public void hey(){
        System.out.println("Hey");
    }
}

//able to implement all the methods so is not abstract
class scratch implements methods {
    public void hey(){
        System.out.println("Hey");
    }
    public void bye() {
        System.out.println("Hey");
    }
}

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