Double division behaving wrongly

Question

I have a HashMap called List wordFreqMap whose size is 234

wordFreqMap = {radiology         


        

Answer 1

what you are doing is dividing an integer by another integer and then trying to cast that to a double. int/int is a int do though you cast that to a double you will not get the actual value with decimal points.

int/int -> int

What you should do is either cast word.getValue() or noOfterms to double then

int/double -> double
double/int -> double
double/double -> double

e.g.

  tf =  (double)word.getValue()/noOfTerms;

or

tf =  word.getValue()/(double)noOfTerms;

Answer 2

You are doing integer division and then casting that answer to a double. What you need to do is cast one of the two values to a double first, and then do division on it. That should get you the answer you desire.

Answer 3

Integer/Integer is an Integer which is casted to a Double so ,it remains an Integer expanded to a Double.

Change it to

 tf =  ( (double)word.getValue() / noOfTerms );

Answer 4

You're performing an integer division and then type casting:

tf = (double) ( word.getValue() / noOfTerms );
                ^-----integer division----^

Type cast one of the elements in the division to convert into a floating point division:

tf = ((double)word.getValue()) / noOfTerms;