ITRemoving zero from decimal part of float

Question

I have floats like these,

0.0 , 50.0 ...

How do I convert them to:

0 , 50 ...

I need the meaningful numbers in the decimal part stay intact; so 13.59 must remain 13.59.

EDIT : my question is way different from that duplicate of yours; if only you read through it you would know it.

"no; they are float as mentioned" -- if they are `float` values, then they do not have a trailing `.0`. Please feel free to post the code where you are getting these values and show where and how you are seeing the `.0`. — CommonsWare, Dec 23 '13 at 16:32
@CommonsWare Cmooon ! you are saying floats do not have trailing .0 ??? is this a joke ? — Shervin4030, Dec 23 '13 at 16:47
A `float` does not have a trailing `.0`. A string representation of a float might. — CommonsWare, Dec 23 '13 at 16:52
@CommonsWare mmm ; in Android ; at the end Im gonno need to use this in textviews; so I guess I have no way out of this; no ? — Shervin4030, Dec 23 '13 at 17:13
@CommonsWare is there anything to replace String.valueOf ? to avoid strings ? — Shervin4030, Dec 23 '13 at 17:14

Greg Giacovelli · Answer 1 · 2013-12-24T09:29:08.890

1

So there are few ways to do this.

For your way I am pretty sure you could get away with a very naive solution.

Number formatToInt(float floating) {
   if (Math.ceil(floating) == Math.floor(floating)) {
       return (int)floating;
    } else {
       return floating;
    }
}

edited Dec 24 '13 at 09:29

answered Dec 23 '13 at 16:04

Greg Giacovelli

10,164
2
47
64

will you explain a little ? I dont understand mFloat, is that sth I can use in Android ? – Shervin4030 Dec 23 '13 at 16:14
won't compile : `Math` methods won't work with `Number`, why not just using `float` ? – kiruwka Dec 23 '13 at 16:15
I think he's just using the `Number` class, but you should be able to make `num` a `float` and this should work correctly. – But I'm Not A Wrapper Class Dec 23 '13 at 16:25
@Shervin4030 you are correct, it's a little confusing. I cleaned it up. Basically if the rounded up is the same as the bottom it can be safely truncated as an int, and otherwise it's a full float. I use the Number class since it's the only way to sort of treat the numbers as the same type. – Greg Giacovelli Dec 24 '13 at 09:30

score 1 · Answer 2 · edited Dec 23 '13 at 16:36

    package com.ceil;

    public class TestCeil {
        public static void main(String[] args) {


            double[] doubleArray = {-100.76 , 80.0 , 192.23};
            Number number;
            for(int i=0; i<doubleArray.length; i++){
                if (Math.ceil(doubleArray[i]) == Math.floor(doubleArray[i])) {
                    number = (int) doubleArray[i];

                }else
                    number= doubleArray[i];
                System.out.println(number); 
            }       


        }

    }

Refer the Java API. Number is the super class of both Double and Integer:

http://docs.oracle.com/javase/7/docs/api/java/lang/Double.html

http://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html

Output can be Integer or Double depending on the decimal place value.

Im working on this; I think this is the solution; brb in 5 or 10 — Shervin4030, Dec 23 '13 at 16:50

ITRemoving zero from decimal part of float

2 Answers2