Re: Decimal rounding of a float data type in Java.

["James Donkin" <James@xxxxxxxxxxxxxxx>]

> DecimalFormat   twoDigits = new  DecimalFormat( " 0.00" );
>
> if ( gradeCounter != 0 ) {
>      average = total / gradeCounter;
>
> // display output here
> JOptionPane.showMessageDialog( null,
>     "Average is  " + twoDigits.format( average ), " Average ",
> JOptionPane.INFORMATION_MESSAGE );
> }

One way for getting rid of the rounding problem would be to...

    float roundedInt = Float.parseFloat(twoDigits.format( average ));

Or you could...

    int temp = (int)(average * 100);
    average = (float)temp / 100;

e.g. average = 4.222222222222
      temp then =  422
      average then becomes 4.22

This feels better to me than using BigDecimal.

James Donkin
me@theComputer.com

----- Original Message -----
From: <Jesus.Bautista@chase.com>
To: <JAVA400-L@midrange.com>
Cc: <JAVA400-L@midrange.com>; <vijosh@systsoft.com>
Sent: Thursday, March 01, 2001 12:46 PM
Subject: Re: Decimal rounding of a float data type in Java.


>
> Here's an example of displaying decimal value:
>
>
>
> DecimalFormat   twoDigits = new  DecimalFormat( " 0.00" );
>
> if ( gradeCounter != 0 ) {
>      average = total / gradeCounter;
>
> // display output here
> JOptionPane.showMessageDialog( null,
>     "Average is  " + twoDigits.format( average ), " Average ",
> JOptionPane.INFORMATION_MESSAGE );
> }
>
> the first statement declares  twoDigits as a reference to an object of
> class DecimalFormat.
>
> DecimalFormat objects are used to format number.  In this example we want
> to output the variable average with two  digits to the right of the
decimal
> point.
>
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