Java format BigDecimal numbers with comma and 2 decimal place

Question

I want to format BigDecimal Numbers with comma and 2 decimal points. e.g.

Amount is: 5.0001 and formatted to: 5.00
Amount is: 999999999.999999 and formatted to: 999,999,999.99
Amount is: 1000.4999 and formatted to: 1,000.49
Amount is: 9999.089 and formatted to: 9,999.08
Amount is: 0.19999 and formatted to: 0.19
Amount is: 123456.99999999 and formatted to: 123,456.99

Solution 1

This should be enough to get the results.

String.format("%,.2f", amount.setScale(2, RoundingMode.DOWN)); 

Solution 2

You should use DecimalFormat:

val df: DecimalFormat = DecimalFormat("#,##0.000")
df.decimalFormatSymbols = DecimalFormatSymbols(Locale.getDefault())
df.format(BigDecimal(123456,78)); //will output 123.456,78 - depending on Locale

Comments

[Pshemo]

Output depends on locale, so maybe use format(Locale.ENGLISH,"%,.2f", amount.setScale(2, RoundingMode.DOWN)). If you change locale to FRANCE you will see little different formatting.