Question

Hi guys I need some help with calculating and displaying a ratio result.

so here is the sample code I am working on:

    double a = 11;
    double b = 2508;
    double total1;
    double total2;

    total1 = a / b;

    System.out.println(total1);

Now the result I get is 0.0043859649122807015 . However I only need the “0.004” the three decimal places, and to calculate the ratio I will need to round “0.004” in to 1 so how do I do that?

Phase2

    double a = 11;
    double b = 2508;
    double total1;
    double total2;

    total1 = a / b;

    System.out.println(total1);

    total2 = 1/total1; //1 is equal a rounded 0.004 then devided by 0.004

    System.out.println(total2);

But I had to manually put 1 to do the calculation. is there a way to store total 1 from the first calculation? total1 = a/b; . So I can call it back to do a “total2 = “A rounded 1 of 0.004″/total1;

Finally print the result out and is 250.

Little formula

11/2508 = 0.004

0.004 = 1 

1/0.004= 250

1:250

I have tried to use decimalformat on j2me but it does not support it

Answer 1

You need a number formatter

http://docs.oracle.com/javase/tutorial/java/data/numberformat.html

System.out.format("%.3f%n", pi);     // -->  "3.142"

Also just flipwhat your formula.

2508/11 = 228

so 1:228
which is more accurate than 1:250