Convert a String to double without Exponential form

Question

i would like to convert a string to double and keep it as it is ,for example i have :

719379705 instead of this 7.19379705E8

is double type having the capacity to display 719379705 as it is and not in exponential form.

i use this method for conversion :

private double toDouble(String valeur) {
    if (valeur != null) {
        return Double.parseDouble(valeur);
    }
    return Double.NaN;
}

thanks

You have to differentiate between the double and its data structure and the visual representation of that data. You cannot change the first. but you can change the second: https://stackoverflow.com/questions/16098046/how-do-i-print-a-double-value-without-scientific-notation-using-java — OH GOD SPIDERS, Jan 02 '20 at 10:33
Both 719379705 and 7.19379705E8 are the **same** value, just different presentation. — Mark Rotteveel, Jan 02 '20 at 15:27

score 5 · Answer 1 · edited Jan 02 '20 at 10:37

5

The value being returned is a valid double, and the E denotes exponential. You do not have to worry about what is being returned inside a double as long as it is a valid double value.

If you need a formatted double value, and not for the computation, I'd suggest you to rather stick to the String.

Even after that, if you just don't like a double value with an exponential, you can rather use the BigDecimal.

return BigDecimal.valueOf(valeur);

I hope this makes sense.

edited Jan 02 '20 at 10:37

deHaar

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answered Jan 02 '20 at 10:32

Safeer Ansari

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**Just a Note:** While I believe that `BigDecimal` is the correct way of representation of numbers, it has its own limitation in terms of speed. – Vishwa Ratna Jan 02 '20 at 10:40
but this returns BigDecimal.valueOf(valeur); returns a BigDecimal .and me i want a double – Arezki Jan 02 '20 at 10:42
2

@Arezki , the precision that you are looking is out of `double` capacity. – Vishwa Ratna Jan 02 '20 at 10:57
2

@VishwaRatna Double has sufficient precision for 719379705 – Mark Rotteveel Jan 02 '20 at 15:26

Convert a String to double without Exponential form

1 Answers1