How to convert Double to int directly?

Question

May be this is silly question. I want to get rid of the fractional part of the Double number. But I cant do that. It shows the error that incompatible types. What to do?

Double to int conversion in one line....please help thanks

How about reading the documentation of the Double class? I am sure there is some method that will do the conversion. — Ingo, Mar 23 '11 at 11:04
You are talking about an error because of incompatible types. Then it's usually a good idea to show the code snippet you have tried. That helps giving better answers. — jmg, Mar 23 '11 at 11:05
@Ingo i did googling and tried my best after that only I came to SO. Thanks for helping hands :) — Selvin, Mar 23 '11 at 11:19
http://docs.oracle.com/javase/7/docs/api/java/lang/Double.html#intValue() — Selvin, Apr 18 '14 at 16:00

score 184 · Accepted Answer · edited Sep 09 '15 at 11:09

184

If you really should use Double instead of double you even can get the int Value of Double by calling:

Double d = new Double(1.23);
int i = d.intValue();

Else its already described by Peter Lawreys answer.

edited Sep 09 '15 at 11:09

Rishabh Srivastava

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answered Mar 23 '11 at 11:04

crusam

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sorry guys. I tried google and found double to int only. So then I came to disturb our Friends here :) That works. many thanks – Selvin Mar 23 '11 at 11:17
This is a *really* bad idea in loops. It's much better to work with primitives. – ingyhere Apr 04 '14 at 02:39
http://docs.oracle.com/javase/7/docs/api/java/lang/Double.html#intValue() – Selvin Apr 18 '14 at 15:59
why I did this and it gives me an error `double cannot be dereferenced`? – Tony Chen Oct 13 '16 at 01:26
most likely you use a primitive type double and not Double, but you may want to ask that in your own question to provide more context. – crusam Oct 13 '16 at 06:42

score 27 · Answer 2 · answered Feb 12 '14 at 16:56

27

All other answer are correct, but remember that if you cast double to int you will loss decimal value.. so 2.9 double become 2 int.

You can use Math.round(double) function or simply do :

(int)(yourDoubleValue + 0.5d)

answered Feb 12 '14 at 16:56

gipinani

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Also worth noting that 2.999999999999997 becomes 2, which is undesired in most cases. – John Weisz Jan 06 '16 at 13:46

score 24 · Answer 3 · answered Mar 04 '15 at 10:41

24

double myDb = 12.3;
int myInt = (int) myDb;

Result is: myInt = 12

answered Mar 04 '15 at 10:41

Daneos

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Daneos the question was about converting `Double` to `int`. Not `double` to `int`. – Selvin Mar 04 '15 at 12:19

score 11 · Answer 4 · answered Mar 23 '11 at 10:58

11

try casting the value

double d = 1.2345;
long l = (long) d;

answered Mar 23 '11 at 10:58

Peter Lawrey

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no it was not double it is a `Double` number. Thats why it shows the error i think. – Selvin Mar 23 '11 at 11:01

score 2 · Answer 5 · edited May 06 '16 at 11:44

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int average_in_int = ( (Double) Math.ceil( sum/count ) ).intValue();

edited May 06 '16 at 11:44

S1LENT WARRIOR

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answered Jan 28 '15 at 11:32

Usman

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Math.ceil OR Math.floor is optional. – Usman Jan 28 '15 at 11:34

How to convert Double to int directly?

5 Answers5

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