The Geometry class extends Shape and provides implementations for the abstract methods. The program showcases polymorphism, abstraction, and inheritance in Java. Abstract Shape Class: Serves as a ...

In Java, abstract classes and methods facilitate abstraction, allowing developers to hide implementation details and focus on essential information. Here's a summarized overview: Abstract classes in ...

From an object-oriented programming perspective ... Only functional interfaces can use the lambda feature in Java. Abstract classes with only one abstract method cannot use lambdas.

For example, using the keyword implements will make a Java interface, while the keyword extends makes an abstract class. Encapsulation in object-oriented programming is the process of wrapping all the ...