Round Number To Only First Decimal Place
I would like to know the available phone memory, so I wrote this code. File path2 = Environment.getDataDirectory(); StatFs stat2 = new StatFs(path.getPath()); long blockSize2 = sta
Solution 1:
If I understood your question right you need NumberFormat
here:
NumberFormatnf= NumberFormat.getInstance();
nf.setMaximumFractionDigits(1);
nf.format(5.654707363);
produces 5,7
Solution 2:
If you need the value for display purpose, use NumberFormat
(see answer by Adam Arnold).
For numeric rounding (producing the rounded number), use BigDecimal
:
double num = 3.141592653589793d;
double rounded = BigDecimal.valueOf(num).setScale(1, BigDecimal.ROUND_HALF_UP).doubleValue();
Solution 3:
Have you tried using free = Math.round(free * 10) / 10d;
instead of free = Math.round(size * 10) / 10d;
? I don't see size
as a defined variable.
A simple test of
doublefree=5.654707363;
free= Math.round(free*10) /10d;
System.out.println(free);
outputs 5.7.
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