Identifying the type of data

Question

How to identify decimal portion value that exists with a float data type?
If the decimal part results as zero, exempting the decimal portion shall be a good practice. How this can be achieved when dealing with float values making it easeful?

Possible duplicate of [How know a variable type in java?](http://stackoverflow.com/questions/2674554/how-know-a-variable-type-in-java) — Josué Zatarain, Jun 16 '16 at 13:33
What does that code have to do with the problem you are facing? Please post the code that shows that you have made an attempt at resolving you our problem. — Popeye, Jun 16 '16 at 14:09

score 0 · Answer 1 · answered Jun 16 '16 at 13:32

0

inputValue.getClass().getName()

example: value: type = java.lang.String

inputValue.getClass().getSimpleName();

example: value: String

answered Jun 16 '16 at 13:32

Josué Zatarain

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Nicolas Filotto · Accepted Answer · 2016-06-16T14:40:43.880

0

Your variables num1 and num2 are both floats not integers as mentioned in your question, I guess that what you want to achieve is to find a way to know if a given float has decimals or not and for this you can proceed as next:

float f = 46.0f;
if (f % 1.0 == 0.0){
    System.out.printf("float without decimal %.0f%n", f);
} else {
    System.out.printf("float with decimals %.2f%n", f);
}

Output:

float without decimal 46

edited Jun 16 '16 at 14:40

answered Jun 16 '16 at 13:58

Nicolas Filotto

43,537
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Based on the input provided by the user, I want the values to be stored W.R.T the data types of the input. Can it be done ? – Pinkesh Jun 16 '16 at 14:05
I don't understand, please reformulate – Nicolas Filotto Jun 16 '16 at 14:13
Suppose that 12 and 34 are inputted numbers which are of integer, it adds up to 46. The resulted value be 46.0 as it is of float data type. I want the output to be of integer data type and eradicate the decimal part. – Pinkesh Jun 16 '16 at 14:39
try it, you will see that is works, as show in my response update – Nicolas Filotto Jun 16 '16 at 14:41

score 0 · Answer 3 · answered Jun 16 '16 at 19:42

Ended up with the below solution.

if (Value - (int) Value) != 0)
   //Contains the decimal portion
else
   //Decimal portion doesn't exist

Helps in identifying the type of value stored and avoid unnecessary usage of decimal portion if an int value.

Identifying the type of data

3 Answers3