Java Tutorial : 21 Abstraction in Java | what is abstract class and abstract methods in Java

This video has theory explanation for abstraction in java.
Abstraction is one of the concepts of OOPS object oriented programming system.

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Lecture 21 Abstract class in Java
Abstract Class and Abstract Methods in Java with Example
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Abstract Class in Java with example,
abstraction and encapsulation | OOPS
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abstract class in java
abstract methods in java

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