Java decimal formatting using String.format?

user_47508 0
Viewed 209545

I need to format a decimal value into a string where I always display at lease 2 decimals and at most 4.

So for example

"34.49596" would be "34.4959" 
"49.3" would be "49.30"

Can this be done using the String.format command?
Or is there an easier/better way to do this in Java.

decimal formatting java
6 Answers

You want java.text.DecimalFormat.

DecimalFormat df = new DecimalFormat("0.00##");
String result = df.format(34.4959);
Richard_Campbell_122540

Here is a small code snippet that does the job:

double a = 34.51234;

NumberFormat df = DecimalFormat.getInstance();
df.setMinimumFractionDigits(2);
df.setMaximumFractionDigits(4);
df.setRoundingMode(RoundingMode.DOWN);

System.out.println(df.format(a));
user_245450

java.text.NumberFormat is probably what you want.

user_196290

NumberFormat and DecimalFormat are definitely what you want. Also, note the NumberFormat.setRoundingMode() method. You can use it to control how rounding or truncation is applied during formatting.

Brian_Clapper_534950

You want java.text.DecimalFormat

user_372130
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