How to always show decimal part when using DecimalFormat?

java decimalformat
Xorty picture Xorty · Aug 30, 2010 · Viewed 19.4k times · Source 
Float sum = new Float(300); // always somehow calculated
DecimalFormat df = new DecimalFormat("#.#");
String s = df.format(sum/3);  // prints 100, I want 100.0
s = df.format(301/3); // pritns 100.3 which is correct

Result should always be formatted to 1 decimal palce, how to do so?

Answer

GaryF picture GaryF · Aug 30, 2010

Change

DecimalFormat df = new DecimalFormat("#.#");

to

DecimalFormat df = new DecimalFormat("#.0");

Basically, a 0 means "always show the digit in this position", where a # means "show the digit in this position unless it's zero".

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