Problem$08.java

package chapter_ten;


import java.util.Locale;
import java.util.Scanner;

/**
 * ***10.8 (Financial: the Tax class) Programming Exercise 8.12 writes a program for
 * computing taxes using arrays. Design a class named Tax to contain the following instance data fields:
 * ■■ int filingStatus: One of the four tax-filing statuses: 0—single filer,
 * 1—married filing jointly or qualifying widow(er), 2—married filing separately,
 * and 3—head of household. Use the public static constants SINGLE_FILER
 * (0), MARRIED_JOINTLY_OR_QUALIFYING_WIDOW(ER) (1), MARRIED_
 * SEPARATELY (2), HEAD_OF_HOUSEHOLD (3) to represent the statuses.
 * ■■ int[][] brackets: Stores the tax brackets for each filing status.
 * ■■ double[] rates: Stores the tax rates for each bracket.
 * ■■ double taxableIncome: Stores the taxable income.
 * Provide the getter and setter methods for each data field and the getTax()
 * method that returns the tax. Also, provide a no-arg constructor and the constructor
 * Tax(filingStatus, brackets, rates, taxableIncome).
 * Draw the UML diagram for the class and then implement the class. Write a test
 * program that uses the Tax class to print the 2001 and 2009 tax tables for taxable
 * income from $50,000 to $60,000 with intervals of $1,000 for all four statuses.
 * The tax rates for the year 2009 were given in Table 3.2. The tax rates for 2001
 * are shown in Table 10.1.
 *
 * @author Sharaf Qeshta
 * */

public class Problem$08
{
    public static Scanner scanner = new Scanner(System.in).useLocale(Locale.US);

    public static void main(String[] args)
    {
        Tax tax2001 = new Tax();
        Tax tax2009 = new Tax();

        double[] rates2001 = {15, 27.5, 30.5, 35.5, 39.1};
        tax2001.setRates(rates2001);

        int[][] brackets2001 =
        {
                {27050, 65550, 136750, 297350},  // Single filer
                {45200, 109250, 166500, 297350}, // Married jointly
                                                 // -or qualifying widow(er)
                {22600, 54625, 83250, 148675},   // Married separately
                {36250, 93650, 151650, 297350} 	 // Head of household
        };
        tax2001.setBrackets(brackets2001);

        final double FROM = 50000;
        final double TO = 60000;
        final double INTERVAL = 1000;

        System.out.println(
                "\n2001 tax tables for taxable income from $50,000 to $60,000");
        print(tax2001, FROM, TO, INTERVAL);

        System.out.println(
                "\n2009 tax tables for taxable income from $50,000 to $60,000");
        print(tax2009, FROM, TO, INTERVAL);

    }
    public static void print(Tax tax, double from, double to, double interval)
    {
        System.out.println(
                "---------------------------------------------------------------------\n" +
                        "Taxable       Single      Married Joint       Married        Head of\n" +
                        "Income                    or Qualifying       Separate       a House\n" +
                        "                          Widow(er)\n" +
                        "---------------------------------------------------------------------");

        for (double taxableIncome = from;
             taxableIncome <= to; taxableIncome += interval)
        {
            tax.setTaxableIncome(taxableIncome);
            System.out.printf("%-13.0f", taxableIncome);
            tax.setFilingStatus(Tax.SINGLE_FILER);
            System.out.printf("%8.2f", tax.getTax());
            tax.setFilingStatus(Tax.MARRIED_JOINTLY_OR_QUALIFYING_WIDOWER);
            System.out.printf("%15.2f", tax.getTax());
            tax.setFilingStatus(Tax.MARRIED_SEPARATELY);
            System.out.printf("%18.2f", tax.getTax());
            tax.setFilingStatus(Tax.HEAD_OF_HOUSEHOLD);
            System.out.printf("%15.2f\n", tax.getTax());
        }
    }
}