Chapter 7, Problem 12PE

Explanation of Solution

Program:

File name: “PrepareTax.java”

//Import necessary header files

import javax.swing.*;

//Define a class named PrepareTax

public class PrepareTax

{

    //Define a main method

    public static void main(String[] args)

    {

        //Declare a string of values

        String entry = "", ssn, last, first, address, city, state, zip;

        //Declare the variables

        char status;

        int x;

        double income = 0;

        boolean isGood = false;

        /*Prompt the user for data as long as the

        Social Security number is not in the correct format,

        with digits and dashes in the appropriate positions*/

        while(!isGood)

        {

            isGood = true;

            //Prompt the user to enter SSN

            entry = JOptionPane.showInputDialog(null,

            "Enter your Social Security number");

/*If SSN is not in the correct format, with digits and dashes in the appropriate positions*/

            if(entry.length() != 11)

            isGood = false;

            /*If SSN is in the correct format, with digits and

            dashes in the appropriate positions*/

            else

            {

                //For loop to be executed until x exceeds 3

                for(x = 0; x < 3; ++x)

                    if(!Character.isDigit(entry.charAt(x)))

                        isGood = false;

                //For loop to be executed until x exceeds 6

                for(x = 4; x < 6; ++x)

                    if(!Character.isDigit(entry.charAt(x)))

                        isGood = false;

                //For loop to be executed until x exceeds 11

                for(x = 8; x < entry.length(); ++x)

                    if(!Character.isDigit(entry.charAt(x)))

                        isGood = false;

                //If third and sixth character is a dash

if(!(entry.charAt(3) == '-') || !(entry.charAt(6) == '-'))

                  isGood = false;

            }

        }

        //Assign the value

        ssn = entry;

        //Prompt the user to eter the first name

        first = JOptionPane.showInputDialog(null,

        "Enter your first name");

        //Prompt the user to eter the last name

        last = JOptionPane.showInputDialog(null,

        "Enter your last name");

        //Prompt the user to eter the address

        address = JOptionPane.showInputDialog(null,

         "Enter your address");

        //Prompt the user to eter the city

        city = JOptionPane.showInputDialog(null,

         "Enter your city");

        //Prompt the user to eter the state

        state = JOptionPane.showInputDialog(null,

         "Enter your state");

        isGood = false;

        /*Prompt the user for data as long as the

        zip code is not five digits*/

        while(!isGood)

        {

            isGood = true;

            //Prompt the user to enter the zip code

            entry = JOptionPane.showInputDialog(null,

            "Enter your Zip code");

            //If zip code is not five digits

            if(entry.length() != 5)

                isGood = false;

            //Else zip code is five digits

            else

                //For loop to be executed until x exceeds 5

                for(x = 0; x < 5; ++x)

                    if(!Character.isDigit(entry.charAt(x)))

                        isGood = false;

        }

        zip = entry;

        isGood = false;

        /*Prompt the user for data as long as the

        marital status does not begin with one of

        the following: S, s, M, or m*/

        while(!isGood)

        {

            isGood = true;

            //Prompt the user to enter the marital status

            entry = JOptionPane...