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

1 vote111 views1 answer
Find Numbers with Even Number of Digits leetcode
Java
0 vote150 views1 answer
Binary to octal conversion java program
Java
9 votes89 views10 answers
Python to java converter
Java
1 vote129 views1 answer
Datatypes in arduino
Java
1 vote123 views1 answer
How to filter data in java
Java
10 votes228 views3 answers
How to get the dimensions of a 2d array in java
Java
1 vote132 views1 answer
Java get delta time from thread
Java
21 votes152 views3 answers
Java terminal colors
Java
3 votes120 views1 answer
Minecraft chunk size
Java
0 vote108 views1 answer
Public class BigInteger { public static void main(String args[]) { long p=2147483648; } }
Java