in reply to mathematical operator for integer division, "div" ?

I am not sure what you are asking for? In java, 5/3 does not yield a result of 2. Indeed, the following example which when compiled and run yields a 1.
public class temp{ public static void main(String[] args){ int a=5; int b=3; int c=a/b; System.out.println(c); } }
Others have suggested that you mean the remainder of the divsion of the two integers but possible you may mean to round up? Perhaps you may clarify this some?