What is meant by Abstract class?
We can create the Abstract class by using “Abstract” keyword before the class name. An abstract class can have both “Abstract” methods and “Non-abstract” methods that are a concrete class.
Abstract method:
The method which has only the declaration and not the implementation is called the abstract method and it has the keyword called “abstract”. Declarations are the ends with a semicolon.
Example:
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public abstract class Manupulation{
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public abstract void add();//Abstract method declaration
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Public void subtract(){
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}
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}
An abstract class may have a Non- abstract method also.
The concrete Subclass which extends the Abstract class should provide the implementation for abstract methods.