How to get Decimal Part Of float number

Question

How to get the decimal part of floating number as decimal in Java?

Like If float f=2.34;

Then decimal part=34;

Not only is this question a duplicate, it is unclear what you want. Let's say the input is 0.015: should the result be a String ("015")? Or a number of hundredths, truncated (1)? Or a number of hundredths, rounded up (2)? It's important to be specific so you don't waste the time of everyone involved. — Patrick Parker, Dec 31 '16 at 09:48

Rehban Khatri · Answer 1 · 2016-12-31T07:36:46.987

1

Try this-

float f=2.34;
float deci = (f - (int)f)*(Math.Pow(10,getDecimalPlaces(f));

getDecimalPlaces(Float f) {
   String txt = Float.toString(f):
   int integerPlaces = txt.indexOf('.'); 
   int decimalPlaces = txt.length() - integerPlaces - 1;
   return decimalPlaces;
}

edited Dec 31 '16 at 07:36

answered Dec 31 '16 at 07:14

Rehban Khatri

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this will give 0.34... but she is asking for 34 – Anand Kumar Dec 31 '16 at 07:25
agreed, I have changed it now – Rehban Khatri Dec 31 '16 at 07:29
1

but this is not a generic solution... what if there is only one decimal value... like 2.3 – Anand Kumar Dec 31 '16 at 07:30
You are right, please see now? – Rehban Khatri Dec 31 '16 at 07:37
your solution might work... but I feel it's too complicated... I was working on a simpler solution... take a look at it... I'm posting – Anand Kumar Dec 31 '16 at 07:57
This code will work for any number of decimal digits. float f = 2.3445f; String s = Float.toString(f); char[] c = s.toCharArray(); int length = s.length(); int flag = 0; StringBuilder n = new StringBuilder(); for(int i = 0; i < length; i++) { if(flag == 1) { n.append(c[i]); } if(c[i] == '.') { flag = 1; } } String result = n.toString(); int answer = Integer.parseInt(result); System.out.println(answer); – Anand Kumar Dec 31 '16 at 07:59
feel free to copy and use it – Anand Kumar Dec 31 '16 at 07:59
Yes sure, will have a look at it – Rehban Khatri Dec 31 '16 at 08:00
1

String s= "12.34"; String fraction = ""; fraction = "0."+s.split("\\.")[1]; System.out.println(fraction); – BattleDrum Dec 31 '16 at 17:14

score 0 · Answer 2 · answered Dec 31 '16 at 07:50

/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
    public static String getDecimalPart(double number, int numOfDigits){

        return String.format("%."+numOfDigits+"f", number-(int)number);
    }
    public static void main (String[] args) throws java.lang.Exception
    {
        System.out.println(getDecimalPart(2.454,2));
    }
}

How to get Decimal Part Of float number

2 Answers2