Describe briefly what we mean by Abstract Class and Concrete Class ar provide your answer with an example of your own by drawing it or writin t.
Abstract class:
An abstract class is a type of class in Java that is declared by the abstract keyword. An abstract class cannot be instantiated directly, i.e. the object of such class cannot be created directly using the new keyword. An abstract class can be instantiated either by a concrete subclass or by defining all the abstract method along with the new statement. It may or may not contain an abstract method. An abstract method is declared by abstract keyword, such methods cannot have a body. If a class contains an abstract method, then it also needs to be abstract.
Concrete Class:
A concrete class in Java is a type of subclass, which implements all the abstract method of its super abstract class which it extends to. It also has implementations of all methods of interfaces it implements.
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