Java float 123.129456 to 123.12 without rounding

Question

How do you cut down float primitive in java to two decimal places, without using rounding?:

123.99999 to 123.99
-8.022222 to         


        

Answer 1

Do keep in mind that float are floating point values. So there might not even be an exact two decimal representation for a certain number.

Having said that, you might try something like:

float f = -8.022222f;
BigDecimal bd = new BigDecimal(f);
BigDecimal res = bd.setScale(2, RoundingMode.HALF_UP);
f = res.floatValue();
System.out.println(f);

You might need to use a different RoundingMode though. Depends on what you want.