In the last tutorials two tutorials, we learned about abstract class and interface. In this tutorial, we will learn what is the difference between Abstract class and Interface.
| Abstract class | Interface |
|---|---|
| An abstract class can have both abstract and non-abstract methods. | But an Interface can have only abstract methods. |
| We can not perform multiple inheritances in the abstract class. | But in the case of Interface we can perform multiple inheritance. |
| An Abstract class can have both final or non-final and static or non-static variables. | But Interface can has only static and final variables. |
| An abstract class can have class members like private, protected, etc. | But in case of interface all members are public by default. |
| We can implement an interface in an abstract class. | But in an Interface can’t implement an abstract class. |
| The abstract keyword is used to declare an abstract class. | The interface keyword is used to declare an interface. |
| To inherit the abstract class in our class we use “extends” keyword. | To inherit in interface in our class we use “implements” keyword. |