CODEWITHSUNDEEP
groovyfloating-point
user2529774
user2529774

Reputation: 47

Groovy : String to float Conversion

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

Upvotes: 3

Views: 6790

Answers (2)

Ahmad Al-Kurdi
Ahmad Al-Kurdi

Reputation: 2305

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()

Upvotes: 1

Raphael
Raphael

Reputation: 1800

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.

Upvotes: 6

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