How to round up a value to 2 decimal places

Question

How to round up a value to 2 digit decimal value?

Answer 1

double a=324.23456

double value = Math.round(a * 100.0) / 100.0;

Output will be: 324.23

Answer 2

double d = 2.34568;
DecimalFormat f = new DecimalFormat("##.00");
System.out.println(f.format(d));