Jun 16, 2019 in JAVA
Q: Difference between abstract class and interface ?

Interface Abstract Class

1) Interface contains only abstract methods 1) Abstract class can contain abstract methods,

concrete methods or both

2) Access Specifiers for methods in interface

must be public

2) Except private we can have any access

specifier for methods in abstract class.

3) Variables defined must be public , static ,

final

3) Except private variables can have any access

specifiers

4) Multiple Inheritance in java is implemented

using interface

4)We cannot achieve multiple inheritance using

abstract class.

5) To implement an interface we use

implements keyword

5)To implement an interface we use implements

keyword

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