displaying Java double value

Question

here's a piece of Java code:

 import java.util.*;

public class javaTests
{
    public static void main(String[] args)
    {
        double decimal = 0.60;

        System.out.println(decimal);
    }
}

I'm trying to print 0.60, but the compiler prints 0.6. How can I get this to print 0.60? Thanks!

try `System.out.println(String.format( "%.2f", decimal ) );` — singhakash, Apr 01 '15 at 17:09
Thank you @singhakash, this worked perfectly! could you briefly explain what `String.format` does? — BjC, Apr 01 '15 at 17:17
See the java formatter class http://docs.oracle.com/javase/7/docs/api/index.html?java/util/Formatter.html %[flags][width][.precision]conversion "." is for padding , 2 specifies the number of digits and f for float — Chandru, Apr 01 '15 at 17:25
@BjC sorry for the late reply did you check the [docs](http://docs.oracle.com/javase/7/docs/api/java/util/Formatter.html#syntax).Its better explaines there — singhakash, Apr 01 '15 at 17:46
possible duplicate of [Round double value to 2 decimal places](http://stackoverflow.com/questions/4985791/round-double-value-to-2-decimal-places) — durron597, Apr 01 '15 at 19:25

score 1 · Accepted Answer · edited Apr 01 '15 at 17:13

1

NumberFormat formatter = new DecimalFormat("#0.00");
double decimal = 0.60;
System.out.println(formatter.format(decimal));

edited Apr 01 '15 at 17:13

singhakash

7,891
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answered Apr 01 '15 at 17:12

Ozgen

1,072
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score 0 · Answer 2 · answered Apr 01 '15 at 17:07

You can't, the way you were trying to do it. A double only stores a number, it doesn't store the precision that number was written with. You can change the formatting of the output (e.g. System.out.printf("%.2f", value), or you can store the value in a different data type (e.g. BigDecimal, which does draw that distinction), but there is no difference in the double value 0.6 and the double value 0.60.

score 0 · Answer 3 · answered Apr 01 '15 at 17:23

You can also format using the String class.

System.out.println(String.format("%1.2f",.60));

The format method takes multiple parameters. The first argument is always the format string, which uses below syntax.

%[argument_index$][flags][width][.precision]conversion

Please refer to the java documentation for detail information on Formatter

http://docs.oracle.com/javase/7/docs/api/java/util/Formatter.html#syntax

displaying Java double value

3 Answers3