Floating Point Problem

Question

Hi,
I wish to know how can I get the floating point to two significant digit?
like 0.012234455 to 0.01?

Answer 1

public class TaDa {
    public static void main(String[] args) {
        double percent = 2 / Math.PI * 100;
        System.out.printf("%.2f", percent);
}The string starting wth % is a format string. The ".2" means you want 2 decimal
places. The "f" means you are dealing with a floating point thing.
There is also String.format("%.2f", percent) which will return a String - the same
one as is printed in the example. These methods became available with Java
1.5 and are documented here:
http://java.sun.com/j2se/1.5.0/docs/api/java/util/Formatter.html
(A similar printf is available in PHP).