Java: double: how to ALWAYS show two decimal digits

Question

I use double values in my project and I would like to always show the first two decimal digits, even if them are zeros. I use this function for rounding and if the value I print

Answer 1

You can use something like this:

If you want to retain 0 also in the answer: then use (0.00) in the format String

double d = 2.46327;
DecimalFormat df = new DecimalFormat("0.00");
System.out.print(df.format(d));

The output: 2.46

double d = 0.0001;
DecimalFormat df = new DecimalFormat("0.00");
System.out.print(df.format(d));

The output: 0.00

However, if you use DecimalFormat df = new DecimalFormat("0.##");

double d = 2.46327;
DecimalFormat df = new DecimalFormat("0.##");
System.out.print(df.format(d));

The output: 2.46

double d = 0.0001;
DecimalFormat df = new DecimalFormat("0.##");
System.out.print(df.format(d));

The output: 0