Modify the payroll system provided to include an additional Employee subclass, named PieceWorker that represents an employee whose pay is based on the number of pieces of merchandise produced. Class PieceWorker should contain private instance variables wage (to store the employee’s wage per piece) and pieces (to store the number of pieces produced).
Provide a concrete implementation of method earnings in class PieceWorker that calculates the employee’s earnings by multiplying the number of pieces produced by the wage per piece. Create an array of Employee variables to store references to objects of each concrete class in the new Employee hierarchy. For each Employee, display its String representation and earnings.
Study the Employee abstract class and the PayrollSystemTest class and understand them before starting the program.
Run your program and copy and paste the output to a file. Create a folder named,
fullname_program1. Copy only your PieceWorker.java source code and the output file to the folder. Zip the folder and upload it to Blackboard
