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import java.util.ArrayList; import java.util.List; abstract class Employee { String firstName; String lastName; Employee(String firstName, String lastName){ this.firstName = firstName; this.lastName = lastName; } abstract double calculatePayroll(); } class HourlyWorker extends Employee { double wage; double hours; HourlyWorker(String firstName, String lastName, double wage, double hours){ super(firstName, lastName); this.wage = wage; this.hours = hours; } double calculatePayroll(){ return wage * hours; } } class CommissionWorker extends Employee{ int quanity; double commission; double salary; CommissionWorker(String firstName, String lastName,int quanity, double commission, double salary){ super(firstName, lastName); this.quanity = quanity; this.commission = commission; this.salary = salary; } double calculatePayroll(){ return salary + quanity * commission; } } public class Example { static void Payroll(ArrayList<Employee> employees){ for (Employee employee : employees) { System.out.println(employee.firstName +" "+ employee.lastName+ " " + employee.calculatePayroll()); } } public static void main(String[] args) throws java.io.IOException { ArrayList<Employee> employees = new ArrayList<Employee>(); HourlyWorker e1 = new HourlyWorker("Hossein", "Khazaei", 10,20); CommissionWorker e2 = new CommissionWorker("Pouria", "Jahandideh", 10,30, 40); employees.add(e1); employees.add(e2); Payroll(employees); } }