Sales commision not calculating in Java

Question

I am running into a very simple problem that is driving me insane. I am trying to calculate the commission of sales and add it to the a salary but when I run the code it always gives me a commission of $0 and a compensation of $0. Here is my code I have so far:

package compensationcalculator;

import java.text.NumberFormat;

public class CompensationCalculator {

    private double salary = 75000;
    private double sales;
    private double commission;
    private double compensation;

    public CompensationCalculator() {

        this.salary = 75000.00;

    }

    public void setSales(double sales) {

        this.sales = sales;

    }

    public double getCommission() {

        this.commission = (sales * 0.2);
        return commission;

    }

    public double getCompensation() {

        this.compensation = (salary + commission);
        return compensation;

    }

    public String toString() {

        NumberFormat fmt = NumberFormat.getCurrencyInstance();

        return ("Annual Salary: " + fmt.format(salary) + "\n"
                        + "Total Sales: " + fmt.format(sales) + "\n"
                        + "Total Commission: " + fmt.format(commission) + "\n"
                        + "Total Annual Compensation: " + fmt.format(compensation));

    }

}

Now when I enter 5000 when prompted for the sales I get this as an answer after it runs:

Annual Salary: $75,000.00
Total Sales: $5,000.00
Total Commission: $0.00
Total Annual Compensation: $0.00

I am sure this is a simple error, but I have not used Java in quite some time. I have compared it to some of my really old code from years ago and can't see what I am missing. Any guidance would be very welcome!

Answer 1

The compensation value is based on the commission, which is a calculated value.

You either need to pre-calculate all the values when you set the values or you need to use the values from these methods, for example...

Pre-calculated...

public void setSales(double sales) {

    this.sales = sales;
    commission = sales * 0.2;
    compensation = salary + commission;

}

public double getCommission() {

    return commission;

}

public double getCompensation() {

    return compensation;

}

Dependency calculated...

public double getCompensation() {

    this.compensation = (salary + getCommission());
    return compensation;

}

public String toString() {

    NumberFormat fmt = NumberFormat.getCurrencyInstance();

    return ("Annual Salary: " + fmt.format(salary) + "\n"
                    + "Total Sales: " + fmt.format(sales) + "\n"
                    + "Total Commission: " + fmt.format(getCommission()) + "\n"
                    + "Total Annual Compensation: " + fmt.format(getCompensation()));

}