Fixed decimal places / Java Groovy

Question

How can I set a fixed number of decimal places for numerical values in Groovy? Obviously that's easy for numbers with 4 decimals and more but what about this one? Example:

def num = 2.58 
return 2.5800

I would like to avoid turning those into strings.

Appreciate your help, thanks

Answer 1

The normal way of dealing with decimal formatting in java/groovy would be the java DecimalFormat class. The following code:

import java.text.DecimalFormat 

def num = 2.58

def df = new DecimalFormat("#0.0000")
def formatted = df.format(num)

println "formatted: ${formatted}"

gives the following output when run:

─➤ groovy solution.groovy 
formatted: 2.5800

─➤