Java double gets all numbers after dot / comma

This is a simple task, but I can't solve it myself

I have

double digit1 = 12.1;
    double digit2 = 12.99;

And need a way to give me this:

anyMethod(digit1); //returns 10
    anyMethod(digit2); //returns 99

What do I have

public static void getAfterComma(double digit) {

    BigDecimal bd = new BigDecimal(( digit - Math.floor( digit )) * 100 );
    bd = bd.setScale(4,RoundingMode.HALF_DOWN);
    System.out.println(bd.toBigInteger()); // prints digit1=1 and digit2=99

}

Anyway, I prefer integer as the return type Did anyone get a quick solution / tip?

Amiable

Solution

Why not simply use:

int anyMethod(double a){
  //if the number has two digits after the decimal point.
  return (int)((a + 0.001) * 100) % 100;
}