TaxTime

TaxTime.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/*
 * Created on 06.01.2006
 */

/**
 * @author weberwu
 * Calculating a Berlin tax that could be done on a beer mat. 
 */
public class TaxTime {
    static int nFamilyMembers;
    static int exemption;
    static double income;
    static double taxTotal;
   
    public static void main(String[] args) {
        
        // A Reader stream to read from the console
        BufferedReader in = 
            new BufferedReader(new InputStreamReader(System.in));
        
        System.out.println ("Welcome to the new Berlin tax calculator.");
        System.out.print   ("How much did you earn last year? ");    
        try {
            income = Double.parseDouble(in.readLine());
        } catch (NumberFormatException e1) {
            e1.printStackTrace();
        } catch (IOException e1) {
            e1.printStackTrace();
        }

//     check income

        if (income < 0) {
            System.out.println ("Even in Berlin, no one has a negative income!");
            System.out.println ("Start over.");
            System.exit (-1);
        }
        
        System.out.print("Enter the number of dependents you have, including yourself: ");
        try {
            String s = in.readLine();
            nFamilyMembers = Integer.valueOf(s).intValue();
        } catch (IOException e) {
            e.printStackTrace();
        }

//     check number of family members

       if (nFamilyMembers <= 0) {
          System.out.println("Did you forget to count yourself?");
          System.out.println ("Start over.");
          System.exit (-1);
          }

//    compute tax total

      if (income < 10000)
         taxTotal = 0.12 * income;
      else if (income < 50000)
         taxTotal = 300.00 + 0.24 * (income - 10000);
      else
         taxTotal = 1500.00 + 0.36 * (income - 50000);

      for (int i = 0; i <= nFamilyMembers; i++){
           taxTotal = taxTotal - 100;
      }
 
//    check negative tax

    if (taxTotal < 0) // In case of negative tax
       taxTotal=0;

    System.out.println ("=€=€=€=€=€=€=€=€=€=€=€=€=€=€=€");
    System.out.println ("Wowereit & Sarrazin GmbH");
    System.out.println ("Tax bill");
    System.out.println ("Your income was " + income + " €.");
    System.out.println ("You have " + nFamilyMembers + " family members.");
    System.out.println ("Your total tax is " + taxTotal + " €.");
    System.out.println ("Family member tax saving is " + nFamilyMembers*100 + "€.");
    System.out.println ("=€=€=€=€=€=€=€=€=€=€=€=€=€=€=€"); 
    }
}