How to specify RoundingMode for decimal numbers in Jasper Reports

Question

I\'m using Java with Jasper Reports and would like to format a decimal value using this format mask \"#,##0.00\". At the first sight all looks fine, but I found

Answer 1

Here is another solution.

You can change the default rounding mode of the number formatter by extending the default JR format factory (net.sf.jasperreports.engine.util.DefaultFormatFactory) and sending an instance of the extended factory via the JRParameter.REPORT_FORMAT_FACTORY parameter.

The rounding mode of a java.text.DecimalFormat instance can be changed via the setRoundingMode() method.

https://community.jaspersoft.com/questions/528989/decimal-formatting-rounding-mode-problem

I've created inner class:

    getParameters().put(REPORT_FORMAT_FACTORY, new DefaultFormatFactory() {

        @Override
        public NumberFormat createNumberFormat(String pattern, Locale locale) {
            NumberFormat format = null;
            if (pattern != null && pattern.trim().length() > 0) {
                if (STANDARD_NUMBER_FORMAT_DURATION.equals(pattern)) {
                    format = new DurationNumberFormat();
                } else {
                    format = locale == null ?
                            NumberFormat.getNumberInstance() :
                            NumberFormat.getNumberInstance(locale);
                    if (format instanceof DecimalFormat) {
                        format.setRoundingMode(HALF_UP);
                        ((DecimalFormat) format).applyPattern(pattern);
                    }
                }
            }
            return format;
        }
    });`