Extract the value from number after dot in java

Question

int number = 24.24;

int afterDot = (int) (number*100)%100;
afterDot = 24

This logic is wrong if

int number1 = 24.4

How can I get the 4 from 24.4 ?
Whatever will be the number but want to extract the value after dot. Actually the formula has to work for both type of value.

What *is* the value of the number after the dot? Is it 24? 240? 2400? etc. — Andy Turner, Feb 08 '17 at 09:35
`int number = 24.24` does not compile. The literal `24.24` is a `double` and must/should be assigned to a `double` typed variable. — Seelenvirtuose, Feb 08 '17 at 09:35
You could - however - [split a `double` value into its whole and fractional parts](http://stackoverflow.com/questions/343584/how-do-i-get-whole-and-fractional-parts-from-double-in-jsp-java). — Seelenvirtuose, Feb 08 '17 at 09:37
use a double first of all cause the int won't accept the .24 — Zeromus, Feb 08 '17 at 09:37
Firstly a Java [`int`](https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html) cannot have a decimal point, assuming you meant a `double` you could do something like this: `int afterDot = Integer.parseInt((String.valueOf(number).split("\\.")[1]));` — Sash Sinha, Feb 08 '17 at 09:46

score 1 · Answer 1 · answered Feb 08 '17 at 09:47

If you convert your double to a string, the problem becomes easier :

double number = 24.4;
String numberAsString = String.valueOf(number);
String decimalPart = numberAsString.split("\\.")[1];
System.out.println(decimalPart);
int number1 = Integer.valueOf(decimalPart); // NOTE: This conversion is lossy.
System.out.println(number1);

Note that by converting your decimalPart string (e.g. "001") to an integer (1), you might lose some information.

With 24.4, it outputs :

4
4

With 24.001, it outputs :

001
1

With 3d, it outputs:

0
0

Extract the value from number after dot in java

1 Answers1