How do I round a double to one decimal place?

Question

I am trying to get a random double returned to me in the format #.# however I am getting a value of something to this effect: 0.9395772067578356

How do you force only a one decimal return on a random double as I cannot put paraments in the .nextDouble.

        myRandomNumGenerator = new Random();
        loadedValue = myRandomNumGenerator.nextDouble();

Benjiman · Accepted Answer · 2013-03-04T03:06:19.810

7

DecimalFormat oneDigit = new DecimalFormat("#,##0.0");//format to 1 decimal place

System.out.println(oneDigit.format(anyVariable)); //generic usage

loadedValue = Double.valueOf(oneDigit.format(loadedValue));//specific usage posted in comments

edited Mar 04 '13 at 03:06

answered Mar 04 '13 at 02:45

Benjiman

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had to add `loadedValue = Double.valueOf(oneDigit.format(loadedValue));` for comparison purposes, but it did the trick. Thanks. – Bob Mar 04 '13 at 02:57

score 2 · Answer 2 · edited Jan 14 '14 at 11:25

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I don't think you can force a one place return. You can just make it print the one place, however.

System.out.printf("%.1f", loadedValue);

That will print the value to one place.

edited Jan 14 '14 at 11:25

Aniket Kulkarni

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answered Mar 04 '13 at 02:46

Human Flotsam

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How do I round a double to one decimal place?

2 Answers2

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