Java 格式带逗号和 2 位小数的 BigDecimal 数字

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

推荐答案

这样应该就可以得到结果了.

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