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POWhy is there a difference between invoking a method and returning a local variable?
 

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  1. POWhy is there a difference between invoking a method and returning a local variable?
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    <p>fails at h.getNetYearlyIncome(), seems to be 5k too high. I have been working on it all day and cannot figure it out.</p> <p>Why is h.getNetYearlyIncome()= h.getGrossYearlyIncome() - h.getTaxesWithheld() not equal to yearlyIncome-taxesWitheld</p> <pre><code>public void testSalariedEmployeeMakingOver100K() { SalariedEmployee h = new SalariedEmployeeImpl("John", "Doe", "Mechanical Turk", 1111, 9166.75); assertEquals(h.getFirstName(), "John"); assertEquals(h.getLastName(), "Doe"); assertEquals(h.getJobTitle(), "Mechanical Turk"); assertEquals(h.getID(), 1111); assertEquals(h.getMonthlySalary(), 9166.75, 0.005); assertEquals(h.getGrossYearlyIncome(), 9166.75*12, 0.005); assertEquals(h.getTaxableIncome(), h.getGrossYearlyIncome(), 0.005); assertEquals(h.getTaxesWithheld(), 15000.25, 0.005); assertEquals(h.getNetYearlyIncome(), h.getGrossYearlyIncome()-h.getTaxesWithheld(), 0.005); } public class SalariedEmployeeImpl extends EmployeeImpl implements SalariedEmployee { String first_name; String last_name; String job_title; int id; double monthly_salary = 0.0; double yearlyIncome = 0.0; double taxableIncome = 0.0; double netIncome = 0.0; double taxesWitheld = 0.0; double over100k = 0.0; double over50k= 0.0; SalariedEmployeeImpl(String first_name, String last_name, String job_title, int id, double monthly_salary) { this.first_name = first_name; this.last_name = last_name; this.job_title = job_title; this.id = id; this.monthly_salary = monthly_salary; } public String getFirstName() { return first_name; } public String getLastName() { return last_name; } public String getJobTitle() { return job_title; } public int getID() { return id; } public double getGrossYearlyIncome() { yearlyIncome = (monthly_salary * 12); return yearlyIncome; } public double getTaxableIncome() { taxableIncome = (monthly_salary*12); return taxableIncome; } public double getTaxesWithheld() { double over100k = 0.0; double over50k= 0.0; if(taxableIncome&gt;100000.0){ over100k = taxableIncome -100000.0; taxableIncome -=over100k; } if(taxableIncome &gt;50000.0 &amp;&amp; taxableIncome &lt;=100000.0){ over50k = taxableIncome-50000.0; taxableIncome -=over50k; } taxesWitheld = taxesWitheld + (.15 * over50k)+(.25 * over100k)+(.1*taxableIncome); return taxesWitheld ; } public double getNetYearlyIncome() { return yearlyIncome-taxesWitheld; } public double getMonthlySalary() { return monthly_salary; } public void setMonthlySalary(double salary) { this.monthly_salary = salary; } </code></pre> <p>}</p>
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      1. POWhy is there a difference between invoking a method and returning a local variable?
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      1. POWhy is there a difference between invoking a method and returning a local variable?
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      1. POWhy is there a difference between invoking a method and returning a local variable?
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    1. COWhat @BheshGurung is saying is true, in that if you use a `double` to represent currency, you're going to get bitten by loss of precision or rounding at some point. However, it's not what's causing your problem.
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