How to format Double with dot?

Question

How do I format a Double with String.format to String with a dot between the integer and decimal part?

String s = String.format("%.2f", price); 

The above formats only with a comma: ",".

Answer 1

String.format(String, Object ...) is using your JVM's default locale. You can use whatever locale using String.format(Locale, String, Object ...) or java.util.Formatter directly.

String s = String.format(Locale.US, "%.2f", price); 

or

String s = new Formatter(Locale.US).format("%.2f", price); 

or

// do this at application startup, e.g. in your main() method Locale.setDefault(Locale.US);  // now you can use String.format(..) as you did before String s = String.format("%.2f", price); 

or

// set locale using system properties at JVM startup java -Duser.language=en -Duser.region=US ... 

Answer 2

Based on this post you can do it like this and it works for me on Android 7.0

import java.text.DecimalFormat import java.text.DecimalFormatSymbols  DecimalFormat df = new DecimalFormat("#,##0.00"); df.setDecimalFormatSymbols(new DecimalFormatSymbols(Locale.ITALY)); System.out.println(df.format(yourNumber)); //will output 123.456,78 

This way you have dot and comma based on your Locale

Answer edited and fixed thanks to Kevin van Mierlo comment