The learning objective of this question is to illustrate the power of Java inheritance and polymorphism The task involves enhancing a Java program by utilizing inheritance and polymorphism to create flexible, reusable code for counting specific elements within an array of integers. You are provided with scaffolding code and need to implement methods and classes that utilize these object-oriented principles. Specifically, you will modify and extend the existing code to facilitate counting integers in an array based on various criteria (positive, negative, even, etc.) without altering the core counting logic. This is achieved by implementing a Predicate class and subclasses that define different test conditions. The countIF method should accept an array of integers and a Predicate object, then count elements satisfying the predicate. Your implementation will include creating the countIF method in the Count class, designing a Predicate class with a test method, and subclassing Predicate to create IsNegative and IsEven classes. These subclasses will override the test method to specify their respective criteria. The final program should demonstrate the use of these classes, enabling flexible counting through polymorphism.
Paper For Above instruction Java’s inheritance and polymorphism features are powerful tools for designing flexible and extendable software systems. This assignment is aimed at illustrating how these concepts can be employed to create reusable code for performing various types of counting operations on an array of integers. By defining a common interface, Predicate, and creating different subclasses, such as IsNegative and IsEven, one can easily extend the functionality without modifying existing code, thereby adhering to the principles of modularity and open-closed design. Introduction The significance of inheritance and polymorphism in Java lies in their ability to promote code reusability and flexibility. In the context of the provided task, these principles enable a single counting method to handle multiple conditions without the need for complex conditional statements or redundant code. This approach aligns with the object-oriented paradigm’s goal of encapsulating behavior within objects, allowing functionality to be extended through class hierarchies. Design and Implementation The initial step involves creating an abstract or base class, Predicate, which contains a single method,