Question

I don’t know why, but I’m getting two different result if I’m changing the parameter from a decimal to a fraction.

These methods would return the exact value. I’m trying to round up a number if it’s a decimal, for example:

0.0 -> 0

0.1 -> 1

0.4 -> 1

0.5 -> 1

0.6 -> 1

1.0 -> 1

1.1 -> 2

// accepts Double
private void myRound(Double d){
   int res = (int)Math.ceil(d);
   return (res <= 0 ? 1 : res);
}

// acepts int
private void myRound(int i){
   int res = (int)Math.ceil(i);
   return (res <= 0 ? 1 : res);
}

Example:

System.out.println(myRound(14 / 10));

OUTPUT: 1

System.out.println(myRound(1.4);

OUTPUT: 2

Answer 1

The thing is that firstly the conversion goes to Integer, where (14/10) is 1, and then it ceils it to 1. 1.4 is a double, so it makes it ceil as a double number.