Question

While Leafing through Internet sites i found this program, any one can help me to solve it by Java ?

http://csee.wvu.edu/~abrady/cs110/docs/cs110-hw7.pdf

Answer 1

So it uses the abstract class Worker
public abstract class Worker {

private String name;
private int hoursWorked;
private double hourlyRate;

public Worker(String name, int hoursWorked, double hourlyRate) {
setName(name);
setHoursWorked(hoursWorked);
setHourlyRate(hourlyRate);
}

protected final String getName() {
return name;
}

private final void setName(String name) {
this.name = name;
}

protected final int getHoursWorked() {
return hoursWorked;
}

private final void setHoursWorked(int hoursWorked) {
this.hoursWorked = hoursWorked;
}

protected final double getHourlyRate() {
return hourlyRate;
}

private final void setHourlyRate(double hourlyRate) {
this.hourlyRate = hourlyRate;
}

protected abstract double getWages();

}

Answer 2

and payroll.txt which is as follows:

Salaried,Wilson,40,6.87
Temporary,Jones,27,4.5
Hourly,Smith,45,5.55
Salaried,Miller,30,7.33
Hourly,Walker,55,5.5
Salaried,Turner,45,8.24
Hourly,Best,35,7.99
Temporary,Johnson,8,4.99
Hourly,Struthers,42,6.49
Hourly,Monson,40,5.99

Answer 3

So first let's examine the Worker class:
So you have an interface class called worker, with 3 variables (name, hoursWorked, hourlyRate), a constructor method (called Worker), and 6 other methods (getter/setter methods). And finally there is an abstract method (an interface) called getWages(). A Protected method can only be called within the inheritance
hierarchy. Public methods can be called from anywhere.

Answer 4

Next, you are given the following INSTRUCTIONS:
Write a program to model three different kinds of employees in a company using inheritance and File I/O. Your program will consist of three classes that extend the class Worker and a testing class Company that reads in payroll information from a file then prints it to the screen.

The Classes SalariedWorker, HourlyWorker, and TemporaryWorker:
To model employees, extend the provided abstract class Worker by writing three new classes: SalariedWorker,HourlyWorker, and TemporaryWorker.


//program to model three different kinds of employees
public class SalariedWorker extends Worker {
}
public class HourlyWorker extends Worker{
}
public class TemporaryWorker extends Worker{
}

Answer 5

You are given the following instructions for a Company class:
Your program will consist of ...a testing class Company that reads in payroll information from a file then prints it to the screen.

so we need a new class called company
//new Company class
public class Company{
//your method to read in payroll info from a file and print it to the screen will go here
}

Next you are told: Create a class called Company with a main method to test your classes. So, slight alteration to the above:

//new Company class
public class Company{
//main method
public static void main(String[] args){
//code to read in payroll info from a file and print it to the screen will go here
}
}

Answer 6

Now it says: " Implement the abstract methods as required." So here, they are talking about the getter setter methods from the Worker interface class I mentioned before. Another important thing they say is: "only write methods that override methods from either Worker or Object." which allows you to over-ride the methods in the Worker class.