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package ca.mokhan.assignment1;
import java.util.Scanner;
public class TaxReturn {
private double income;
private int status;
private int children;
/**
* Constructs a TaxReturn object for a given income and marital status, and computes the tax.
*
* @param income the taxpayer income
* @param status either SINGLE or MARRIED
*/
public TaxReturn(double income, int status) {
this(income, status, 0);
}
public TaxReturn(double income, int status, int children) {
this.income = income;
this.status = status;
this.children = children;
if (this.isSingle()) this.income -= children * 5000;
}
public double getTax() {
double tax = 0;
if (isSingle()) {
if (income <= SINGLE_BRACKET1) tax = RATE1 * income;
else if (income <= SINGLE_BRACKET2)
tax = RATE1 * SINGLE_BRACKET1 + RATE2 * (income - SINGLE_BRACKET1);
else
tax =
RATE1 * SINGLE_BRACKET1
+ RATE2 * (SINGLE_BRACKET2 - SINGLE_BRACKET1)
+ RATE3 * (income - SINGLE_BRACKET2);
if (income > 249999.0) tax += (income - 150000) * 0.25;
} else {
if (income <= MARRIED_BRACKET1) tax = RATE1 * income;
else if (income <= MARRIED_BRACKET2)
tax = RATE1 * MARRIED_BRACKET1 + RATE2 * (income - MARRIED_BRACKET1);
else
tax =
RATE1 * MARRIED_BRACKET1
+ RATE2 * (MARRIED_BRACKET2 - MARRIED_BRACKET1)
+ RATE3 * (income - MARRIED_BRACKET2);
if (income > 349999.0) tax += (income - 200000) * 0.35;
}
return tax;
}
public static final int SINGLE = 1;
public static final int MARRIED = 2;
public static final double RATE1 = 0.15;
public static final double RATE2 = 0.28;
public static final double RATE3 = 0.31;
public static final double SINGLE_BRACKET1 = 21450;
public static final double SINGLE_BRACKET2 = 51900;
public static final double MARRIED_BRACKET1 = 35800;
public static final double MARRIED_BRACKET2 = 86500;
private boolean isSingle() {
return this.status == SINGLE;
}
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.print("Please enter your income: ");
double income = in.nextDouble();
System.out.print("Enter S (single) or M (married): ");
String input = in.next();
int status = 0;
if (input.equalsIgnoreCase("S")) status = TaxReturn.SINGLE;
else if (input.equalsIgnoreCase("M")) status = TaxReturn.MARRIED;
else {
System.out.println("Bad input.");
return;
}
TaxReturn aTaxReturn = new TaxReturn(income, status);
System.out.println("The tax is " + aTaxReturn.getTax());
}
}
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