Conversion of a floating value without E- notation

Question

I have different float values like

0.0000009
8145.32
123.00001
1235.01000

I want them showing to a TextView or converting them to string without getting an exponential notation. when I use String.format("%.8f", num), It is getting random values after the real number ( num = 8145.32 -> 8145.32539487).

Help me, Thank you

See https://stackoverflow.com/questions/588004/is-floating-point-math-broken — Oliver Charlesworth, Apr 17 '18 at 07:44
If you want 2 decimal places, use a DecimalFormat like so: `DecimalFormat df = new DecimalFormat("#.00"); ` careful though, it might not round the way you want — HBo, Apr 17 '18 at 07:48
`System.out.println(String.format("%.8f", 8145.32));` -> `8145.32000000` — Scary Wombat, Apr 17 '18 at 07:55

score 1 · Answer 1 · answered Apr 17 '18 at 07:50

1

Try this use DecimalFormat

DecimalFormat is a concrete subclass of NumberFormat that formats decimal numbers. It has a variety of features designed to make it possible to parse and format numbers in any locale, including support for Western, Arabic, and Indic digits

SAMPLE CODE

 Double value = 123456434.678;
 DecimalFormat decimalFormat = new DecimalFormat("#0.00");
 Log.e("MY_VALUES", decimalFormat.format(value));

OUTPUT

com.example.nilesh.testapp E/MY_VALUES: 123456434.68

answered Apr 17 '18 at 07:50

AskNilesh

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1

This seems a good answer to me. I see no actual reason to downvote it. – Phantômaxx Apr 17 '18 at 07:55
1

I am not sure it gives anything better than the OP's `String.format("%.8f", num)` – Scary Wombat Apr 17 '18 at 07:57
1

@NileshRathod Can't get the reason for that. – Phantômaxx Apr 17 '18 at 07:59
1

@KlingKlang sir agree with u – AskNilesh Apr 17 '18 at 08:00
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`String.format()` can produce ***weird results*** in its precision, while `DecimalFormat()` is ***exact***. See this: http://javadevnotes.com/java-float-to-string-without-exponential-scientific-notation – Phantômaxx Apr 17 '18 at 08:03
3

If this is actually the answer, isn't it a duplicate of something like this: https://stackoverflow.com/questions/8819842/best-way-to-format-a-double-value-to-2-decimal-places ? Just asking... – HBo Apr 17 '18 at 08:04
1

@HBo Not an exact duplicate, but very close to that. Good find. – Phantômaxx Apr 17 '18 at 08:12
Thanks for your response. But what I need is not in that link. – Afinas EM Apr 17 '18 at 10:46
Guys I need full decimal part except last zeros – Afinas EM Apr 17 '18 at 10:57
@AfinasEM try this **`DecimalFormat decimalFormat = new DecimalFormat("#.##");`** – AskNilesh Apr 17 '18 at 10:59
@ Nilesh Rathod, The problem is I need the whole decimal part (except zeros).The number may contain 10 digits on the decimal part. – Afinas EM Apr 17 '18 at 12:17

Conversion of a floating value without E- notation

1 Answers1