Java格式帶逗號和2位小數點的BigDecimal數字

Question

我想使用逗號和2個小數點格式化BigDecimal數字。 例如

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 

Answer 1

這應該足以獲得結果。

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