A company pays its employees on a weekly basis. The employees are of five types:

1. Salaried employees are paid a fixed weekly salary regardless of the number of hours worked,
2. Hourly employees are paid by the hour and receive overtime pay (i.e., 1.5 times their hourly salary rate) for all hours worked in excess of 40 hours,
3. Piece workers are paid by the number of merchandise produced in a week,
4. Commission employees are paid a percentage (10% for example) of their sales.
5. Salaried-commission employees are paid a base salary plus a percentage (5% for example) of total sales to their base salaries.

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PayrollSystemTester.java package payrollsystemtester;

import java.util.ArrayList; public class PayrollSystemTester { public static void main( String args[] ) { // create an ArrayList to hold different types of employee objects. // ArrayList employees = new ArrayList<>(); ArrayList employees = new ArrayList<>(); // initialize the arraylist emploees with Employees employees.add(new SalariedEmployee( "James", "Lebron", "121-11-1111", 1200.00)); employees.add(new HourlyEmployee("Maria", "Garcia", "232-22-2222", 26.75, 50)); employees.add( new CommissionEmployee("David", "Kim", "343-33-3333", 20000, .07)); employees.add( new BasePlusCommissionEmployee( "John", "Miller", "454-44-4444", 9000, .05, 900)); employees.add( new PieceWorker("Robert", "Green", "565-55-5555", 7.25, 700)); employees.add(new SalariedEmployee( "Jeff", "Turner", "111-11-1111", 800.00 )); employees.add(new HourlyEmployee("Samuel", "Bryant", "222-22-2222", 16.75, 40)); employees.add( new CommissionEmployee("Avery", "Butler", "333-33-3333", 10000, .06)); employees.add( new BasePlusCommissionEmployee( "Lucas", "Wood", "444-44-4444", 5000, .04, 300)); employees.add( new PieceWorker("Robert", "Williams", "555-55-5555", 2.25, 400));

System.out.println( "Employees processed polymorphically: " );

// generically process each element in array employees double salariedEmployeeTotal = 0; double hourlyEmployeeTotal = 0; double commissionEmployeeTotal = 0; double commissionPlusEmployeeTotal = 0; double pieceWorkerEmployeeTotal = 0;

for ( Employee currentEmployee : employees ) { System.out.println( currentEmployee ); // invokes toString System.out.printf( "earned $%,.2f ", currentEmployee.earnings() ); if (currentEmployee instanceof SalariedEmployee) salariedEmployeeTotal += currentEmployee.earnings(); else if (currentEmployee instanceof HourlyEmployee) hourlyEmployeeTotal += currentEmployee.earnings(); else if (currentEmployee instanceof BasePlusCommissionEmployee) commissionPlusEmployeeTotal += currentEmployee.earnings(); else if (currentEmployee instanceof CommissionEmployee) commissionEmployeeTotal += currentEmployee.earnings(); else pieceWorkerEmployeeTotal += currentEmployee.earnings(); } // end for

System.out.printf (" %-40s%10.2f","Salaried Employee Total:", salariedEmployeeTotal); System.out.printf (" %-40s%10.2f","Hourly Employee Total:", hourlyEmployeeTotal); System.out.printf (" %-40s%10.2f","Commission Employee Total:", commissionEmployeeTotal); System.out.printf (" %-40s%10.2f","Base Plus Commission Employee Total:", commissionPlusEmployeeTotal); System.out.printf (" %-40s%10.2f","PieceWorker Employee Total:", pieceWorkerEmployeeTotal); } // end main } // end class PayrollSystemTest

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output

run: Employees processed polymorphically:

Salaried Employee :Lebron James social security number:121-11-1111 weekly salary :1200.0 earned $1,200.00

Hourly Employee :Maria Garcia social security number:232-22-2222 hourly wages :26.75 hours worked :50.0 earned $1,471.25

Commission Employee :David Kim social security number:343-33-3333 gross sales :20000.0 commission rate :0.07 earned $1,400.00

base-salaried commission employee :John Miller social security number:454-44-4444 gross sales :9000.0 commission rate :0.05 base salary :900.0 earned $1,350.00

Piece worker :Robert Green social security number:565-55-5555 wage per piece :7.25 pieces produced :700.0 earned $5,075.00

Salaried Employee :Turner Jeff social security number:111-11-1111 weekly salary :800.0 earned $800.00

Hourly Employee :Samuel Bryant social security number:222-22-2222 hourly wages :16.75 hours worked :40.0 earned $670.00

Commission Employee :Avery Butler social security number:333-33-3333 gross sales :10000.0 commission rate :0.06 earned $600.00

base-salaried commission employee :Lucas Wood social security number:444-44-4444 gross sales :5000.0 commission rate :0.04 base salary :300.0 earned $500.00

Piece worker :Robert Williams social security number:555-55-5555 wage per piece :2.25 pieces produced :400.0 earned $900.00

Salaried Employee Total: 2000.00 Hourly Employee Total: 2141.25 Commission Employee Total: 2000.00 Base Plus Commission Employee Total: 1850.00 PieceWorker Employee Total: 5975.00