How to input Decimal figures in a input line

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2 total messages Started by mrbafner Sat, 03 Jul 1999 00:00

#1183

Author: mrbafner
Date: Sat, 03 Jul 1999 00:00

71 lines
2843 bytes

Hi,

How can you input numbers in decimal form, here is the program I am working
on, but I cannot input decimal number (example 4.50). If this is possible I
would really appreciate the response, thanks.

===========================================================


import java.io.*;
 public class PayPacket {

   final static double Tax_Rate           = 0.3;    // tax rate percentage

   public static void main (String[] args)
       throws IOException
   {
     System.out.println ("SALES TAX CALCULATOR");    // create a text input
stream


     BufferedReader stdin   =   new BufferedReader
        (new InputStreamReader (System.in));

// this  allow people to input something, then the computer can work of
these figures

     String initString;
     double HourlyRate;          // stores user input
     double NoOfHours;          // stores user input
     double GrossPay; // stores salary before tax tax
     double tax;                 // stores payable tax
     double NetPay;                 // stores pay after tax


     System.out.print ("Enter the Hourly Rate: " + "\n");
     initString      =   stdin.readLine();
     HourlyRate   =   Integer.parseInt (initString);    // calculate payable
tax

     System.out.print ("Number of Hours Worked: \n");
     initString      =   stdin.readLine();
     NoOfHours   =   Integer.parseInt (initString);



GrossPay = HourlyRate * NoOfHours ;

     if (GrossPay >0 )
     {
       tax =  GrossPay * Tax_Rate ;
     }

     else
     {
       tax = 0;
     }    // calculate NetPay

     NetPay = GrossPay - tax;     // Output NetPay

     System.out.println();
     System.out.println("Hourly Rate               : " + HourlyRate );
     System.out.println("Hours Worked               : " + NoOfHours );
     System.out.println("Gross Pay               : " + GrossPay );
     System.out.println("Total Tax (" + Tax_Rate + " %): " + tax );
     System.out.println("--------------------------------");
     System.out.println("Net Pay           : " + NetPay );
   }
 }

=================================================================

Re: How to input Decimal figures in a input line

#1184

Author: Tom Davies
Date: Sun, 04 Jul 1999 00:00

79 lines
3362 bytes

You are parsing your string as an integer. Try parsing with
Double.valueOf(), and note that you'll have to catch a
NumberFormatException and print an error message.

If you are unsure of the difference between an integer and a real number
ask and I'll explain it.

Hope this helps.

Tom

mrbafner wrote:
> 
> Hi,
> 
> How can you input numbers in decimal form, here is the program I am working
> on, but I cannot input decimal number (example 4.50). If this is possible I
> would really appreciate the response, thanks.
> 
> ===========================================================
> 
> import java.io.*;
>  public class PayPacket {
> 
>    final static double Tax_Rate           = 0.3;    // tax rate percentage
> 
>    public static void main (String[] args)
>        throws IOException
>    {
>      System.out.println ("SALES TAX CALCULATOR");    // create a text input
> stream
> 
>      BufferedReader stdin   =   new BufferedReader
>         (new InputStreamReader (System.in));
> 
> // this  allow people to input something, then the computer can work of
> these figures
> 
>      String initString;
>      double HourlyRate;          // stores user input
>      double NoOfHours;          // stores user input
>      double GrossPay; // stores salary before tax tax
>      double tax;                 // stores payable tax
>      double NetPay;                 // stores pay after tax
> 
>      System.out.print ("Enter the Hourly Rate: " + "\n");
>      initString      =   stdin.readLine();
>      HourlyRate   =   Integer.parseInt (initString);    // calculate payable
> tax
> 
>      System.out.print ("Number of Hours Worked: \n");
>      initString      =   stdin.readLine();
>      NoOfHours   =   Integer.parseInt (initString);
> 
> GrossPay = HourlyRate * NoOfHours ;
> 
>      if (GrossPay >0 )
>      {
>        tax =  GrossPay * Tax_Rate ;
>      }
> 
>      else
>      {
>        tax = 0;
>      }    // calculate NetPay
> 
>      NetPay = GrossPay - tax;     // Output NetPay
> 
>      System.out.println();
>      System.out.println("Hourly Rate               : " + HourlyRate );
>      System.out.println("Hours Worked               : " + NoOfHours );
>      System.out.println("Gross Pay               : " + GrossPay );
>      System.out.println("Total Tax (" + Tax_Rate + " %): " + tax );
>      System.out.println("--------------------------------");
>      System.out.println("Net Pay           : " + NetPay );
>    }
>  }
> 
> =================================================================

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