Unexpected result in Java (floating to integer) [duplicate]

Question

I have a problem with this

System.out.print((9/5) * 3);

I expects the result 5.4 but it returns 3. Why is this happening?

Answer 1

9/5 is evaluated in integer arithmetic, so it's equal to 1.

Writing 9.0 / 5 * 3 is a common fix. (Promoting one of the coefficients in the term to a double forces the evaluation to take place in double precision floating point.)