TaxReturn.java.html

  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  }