Groovy : String to float Conversion

Question

Used code below to save value for float

domainInstance.standardScore = params["standardScore"] as float

In this case my input was given as 17.9 and in db2 database saving as 17.899999618530273 but I want to save as 17.9 itself, let me know how to do it

Answer 1

You can't set precision to a Float or Double in Java. You need to use BigDecimal.

domainInstance.standardScore = new BigDecimal(params["standardScore"]).setScale(1, BigDecimal.ROUND_HALF_UP);

The method BigDecimal.setScale(1, ...) limits decimal to one place only. The second parameter is the rounding strategy.

Answer 2

You need to use BigDecimal to do Conversion from String, then BigDecimal(value).floatValue() to get float, You can do this on more that one way, examples

1 - Using setScale in BigDecimal

   def temp = new BigDecimal(params["standardScore"]).setScale(1, BigDecimal.ROUND_HALF_UP)

2- Using DecimalFormat

    DecimalFormat df = new DecimalFormat("#.0");
    def temp =  new BigDecimal(df.format(params["standardScore"] ))

Then you need to get the float value

domainInstance.standardScore = temp.floatValue()