Abstract vs interface java

Interface vs abstract class java

an abstract class can have abstract and non-abstract instance methods while an interface can have abstract or default instance methods;
an abstract class can extend another abstract or regular class and an interface can only extend another interface;
an abstract class can extend only one class while an interface can extend any number of interfaces;
an abstract class can have final, non-final, static, non-static variables (regular fields) while an interface can only have static final variables;
an abstract class can provide an implementation of an interface but an interface cannot provide an implementation of an abstract class;
an abstract class can have a constructor and an interface cannot;
in an abstract class, the keyword abstract is mandatory to declare a method as an abstract one while in an interface this keyword is optional.

Source: grepper.com

Interface vs abstract class java

Interfaces specify what a class must do. 
It is the blueprint of the class.
It is used to achieve total abstraction. 
We are using implements keyword for interface.

Basic statement we all know in Selenium is
WebDriver driver = new FirefoxDriver();
WebDriver itself is an Interface.
So we are initializing Firefox browser
using Selenium WebDriver.
It means we are creating a reference variable
of the interface and creating an Object.
So WebDriver is an Interface and
FirefoxDriver is a class.

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.

Source: grepper.com

Similar codes

0 vote185 views1 answer
Converter float para string em java
Java
6 votes220 views2 answers
Java heap example
Java
0 vote200 views1 answer
Syntax for new module creation in java
Java
0 vote192 views1 answer
Java mostrar resultados ventana grafica
Java
0 vote179 views1 answer
Exitonclose swing
Java
0 vote239 views1 answer
Android-edittext allow only characters and numbers
Java
-1 vote197 views1 answer
How to change java class name in intellij
Java
0 vote217 views1 answer
Java decler variabel
Java
0 vote209 views1 answer
Thread java timer
Java
13 votes260 views2 answers
Java version command
Java