如何通过使用Java中的BigDecimals提高数字的浮点精度？

Question

Let's assume I have a string number such as 1000.0 and I want to create BigDecimal out of it in the following format: 1000.00

edit: And also if the string number already has a floating precision of two decimals, don't touch it.

How can I do this by using BigDecimals?.

Answer 1

Use setScale(...) , something like that:

BigDecimal result = new BigDecimal("1000.0");
result.setScale(2, RoundingMode.HALF_UP);