Lesson 3 Method Overriding.

Ontonomo · June 9th, 2011, 01:49 PM

I have the TestTax class;

Code:

class TestTax {
	public static void main (String[] args){
		NJTax t = new NJTax();
		
		t.grossIncome= 50000;
		t.dependents= 2;
		t.state= "NJ";
		
		double yourTax = t.calcTax();
		double totalTax = t.adjustForStudents(yourTax);
		
		System.out.println("Your tax is " + yourTax);
	}
}

Code:

class tax {
	double grossIncome;
	String state;
	int dependents;
	
	public double calcTax(){
		double stateTax = 0;
		if(grossIncome < 30000){
			stateTax = grossIncome * 0.05;
		}
		else{
			stateTax = grossIncome * 0.06;
		}
		return stateTax;
	}
	
	public void printAnnualTaxReturn(){
		// code goes here
	}
}

Code:

public class NJTax extends tax{
	double adjustForStudents (double stateTax){
	double adjustedTax = stateTax - 500;
	return adjustedTax;
	
		public double calcTax(){
			
		}
	
	}
}

I am having trouble with the Lesson requirement to:
"Change the functionality of calcTax( ) by overriding it in NJTax. The new version of calcTax( ) should lower the tax by $500 before returning the value."

How is this accomplished. I just have safaribooksonline and no videos for the solution.

skippywilliams · June 16th, 2011, 05:11 PM

in your class for TestTax look at the println: ("Your tax is " + yourTax);

Try ("Your tax is " + totalTax);

That is the one you are using for the NJTax override.