Re: Rounding in Java

[Daryani Santosh]

Here's some code that will help you accomplish rounding to fix decimal places.
All my code may not be needed ,
pick the pieces you need.

public static String format(double source) {
        synchronized (cacheLocale) {
            updateCache();
            return cacheNumberFormat.format(source);
        }
    }

    public static Number parse(String source) {
        synchronized (cacheLocale) {
            updateCache();
            try {
                return cacheNumberFormat.parse(source);
            } catch (ParseException p) {
                return INVALID;
            }
        }
    }

    // ============= privates =============
    private static void updateCache() {
        Locale current = Locale.getDefault();
        if (!current.equals(cacheLocale)) {
            cacheLocale = current;
            cacheNumberFormat = NumberFormat.getInstance(cacheLocale);
               cacheNumberFormat.setMaximumFractionDigits(2);
               cacheNumberFormat.setMinimumFractionDigits(2);
        }
    }

     public double getDouble(String num)      {

     if (num==null) return 0.00;

     if(num.startsWith("$"))
          num = num.substring(1);
     if(num.startsWith("N/A"))
          num = "0.0";

          Number parsedNum = this.parse(num);
          return
Double.isNaN(parsedNum.doubleValue())?0.0:parsedNum.doubleValue();
     }

     public String fixDecimalPlaces(double num)    {
          return Double.isNaN(num)?"0.00":this.format(num);
     }

     public static final Double INVALID = new Double(Double.NaN);
     private static Locale cacheLocale = new Locale("NONE","","");
                private static NumberFormat cacheNumberFormat;


hope that helps
santosh









Alireza Nahavandi <[EMAIL PROTECTED]> on 10/23/2001 09:50:42 AM

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To:   [EMAIL PROTECTED]
cc:    (bcc: Santosh Daryani/IT/Aon Consulting)

Subject:  Rounding in Java



In Java, how can I round a double value with specific precision. Example :
value 1.715 need to be round up to 1.72 and 1.714 need to be round down to
1.71.

Thank you.

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