Java Tutorials: abstract classes | abstract Method | Implementation

abstract classes:
- When similar classes has common functionality & some functionality are differently respective, than create abstract class, but if all are implemented differently, use interface.

- method which'll implemented accordingly make them as abstract & class as well

- abstract class is incomplete, so you can not create object of it.

- Classes which'll extends abstract class need to implement abstract method, if it's defining method then subclass also becomes abstract class

- abstract method can't be final, private

- abstract class is created for closely associated classes, but interface is like utility

- A class can extends only single classes, but can implement multiple interfaces

Do watch video for more info.

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