In java: is there a way to round a double number without using methods?

Question

I have a very simple code and I am not used to deal with libraries, yet. I want a way to round the number like what we do in "C" (%.2).

Do you mean there is no simple way? – Ibrahim Alawwad Oct 02 '15 at 00:51 — Ibrahim Alawwad, Oct 02 '15 at 00:51
Do the standard libraries, the JDK, count as _libraries_? – Sotirios Delimanolis Oct 02 '15 at 00:52 — Sotirios Delimanolis, Oct 02 '15 at 00:52

score 2 · Answer 1 · answered Oct 02 '15 at 00:52

2

It depends on exactly what you want to do. If you are seeking the equivalent of C's

printf("%.2f", doubleValue);

you can use:

System.out.println( String.format("%.2f", doubleValue) );

This uses standard Java code that would be available in all JVMs, ie. no external libraries are required.

answered Oct 02 '15 at 00:52

dave

That's JUST what I need. Thanks – Ibrahim Alawwad Oct 02 '15 at 00:58
You could also just write `System.out.printf("%.2f%n", doubleValue)`. – Louis Wasserman Oct 02 '15 at 00:59
@IbrahimAlawwad Happy to help. You can of course accept my answer (hint, hint) :) – dave Oct 02 '15 at 01:14

score 1 · Accepted Answer · answered Oct 02 '15 at 00:50

1

If I understand the question correctly,

double x = 1.2764;
double x_to_2_decimals = (int)(x * 100 + 0.5) / 100.0;

answered Oct 02 '15 at 00:50

Amadan

2 Answers2