Write a java application to calculate how much federal and state tax you need to

Question

Write a java application to calculate how much federal and state tax you need to pay. The program should accomplish the following task: ask your name, yearly income, federal tax rate, state tax rate, and tax you need to pay. Your program needs to be able to catch user input errors.

Sorry I can not find any of my previous written excersise on this or I would submit an example of what I have, I am very tired and foggy right now, getting over a bug that has had me layed out almost two weeks and trying to catch up on my classes. Any help will be appreciated. Is there a way to increase the Karma Awarded for answering questions?

Explanation / Answer

import java.util.Scanner;

class Tax
{
public static void main(String[] args)
{
Scanner kb = new Scanner(System.in);

System.out.print("Enter your first name: ");
String name = kb.next();

System.out.print("Enter your last name: ");
name += " "+kb.next();

double income, stateTaxRate, federalTaxRate;

while(true)
{
System.out.print("Enter your yearly income: ");

try
{
income = kb.nextDouble();

if(income >=0)
{
break;
}
else
{
System.out.println("Income cannot be negative.");
}
}
catch(NumberFormatException ex){}
}

while(true)
{
System.out.print("Enter your federal tax rate (in percent): ");

try
{
federalTaxRate = kb.nextDouble()/100;

if(federalTaxRate >= 0 && federalTaxRate < 1)
{
break;
}
else
{
System.out.println("Federal tax rate must be between 0% and 100%.");
}
}
catch(NumberFormatException ex){}
}

while(true)
{
System.out.print("Enter your state tax rate (in percent): ");

try
{
stateTaxRate = kb.nextDouble()/100;

if(stateTaxRate >= 0 && stateTaxRate < 1 && stateTaxRate + federalTaxRate < 1)
{
break;
}
else
{
System.out.println("State tax rate must be between 0% and 100%. Total tax cannot exceed 100%.");
}
}
catch(NumberFormatException ex){}
}

double stateTax = stateTaxRate*income;
double federalTax = federalTaxRate*income;

System.out.println(" Tax for "+name+":");
System.out.printf(" Federal tax: $%.2f ", federalTax);
System.out.printf(" State tax: $%.2f ", stateTax);
System.out.printf(" Total tax: $%.2f ", federalTax + stateTax);
}
}

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