1 /**
2 A tax return of a taxpayer in 2008.
3 */
4 public class TaxReturn
5 {
6 public static final int SINGLE = 1;
7 public static final int MARRIED = 2;
8
9 private static final double RATE1 = 0.10;
10 private static final double RATE2 = 0.25;
11 private static final double RATE1_SINGLE_LIMIT = 32000;
12 private static final double RATE1_MARRIED_LIMIT = 64000;
13
14 private double income;
15 private int status;
16
17 /**
18 Constructs a TaxReturn object for a given income and
19 marital status.
20 @param anIncome the taxpayer income
21 @param aStatus either SINGLE or MARRIED
22 */
23 public TaxReturn(double anIncome, int aStatus)
24 {
25 income = anIncome;
26 status = aStatus;
27 }
28
29 public double getTax()
30 {
31 double tax1 = 0;
32 double tax2 = 0;
33
34 if (status == SINGLE)
35 {
36 if (income <= RATE1_SINGLE_LIMIT)
37 {
38 tax1 = RATE1 * income;
39 }
40 else
41 {
42 tax1 = RATE1 * RATE1_SINGLE_LIMIT;
43 tax2 = RATE2 * (income - RATE1_SINGLE_LIMIT);
44 }
45 }
46 else
47 {
48 if (income <= RATE1_MARRIED_LIMIT)
49 {
50 tax1 = RATE1 * income;
51 }
52 else
53 {
54 tax1 = RATE1 * RATE1_MARRIED_LIMIT;
55 tax2 = RATE2 * (income - RATE1_MARRIED_LIMIT);
56 }
57 }
58
59 return tax1 + tax2;
60 }
61 }