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double without the exponent

6 replies on 1 page. Most recent reply: Oct 16, 2003 4:16 AM by Alex S

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patoots

Posts: 6
Nickname: patoots
Registered: Oct, 2003

double without the exponent Posted: Oct 13, 2003 6:44 PM
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Hi! Have a prob.

What happens is that... when I have a value of

String tempNum = 123456789012.12

...and when i convert the variable (tempNum) to a double:

double doubleNum = Double.parseDouble(tempNum);

the result of doubleNum = 1.2345678901212E11.

Just like to ask if there's a possibility that you take away the E(exponent) in a value whose datatype is of double and still get the same value 1234567890.12 which is numeric? Or should I not use double if i want to reach that result?

Thanks! This would be of great help!

patoots


Alex S

Posts: 27
Nickname: andu
Registered: Mar, 2003

Re: double without the exponent Posted: Oct 13, 2003 11:16 PM
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If you have decimal numbers, you can store them in a long or double variable.

And if you want to display them, you can use the DecimalFormat class to remove your exponent.

Senthoorkumaran Punniamoorthy

Posts: 335
Nickname: senthoor
Registered: Mar, 2002

Re: double without the exponent Posted: Oct 14, 2003 12:13 AM
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The fact that you are converting String to double means that you are planning to use it in some calculations???

If yes do you expect exact results from those calculations?

If yes double might not be suitable and you might want to look into BigDecimal class.

Senthoor

patoots

Posts: 6
Nickname: patoots
Registered: Oct, 2003

Re: double without the exponent Posted: Oct 15, 2003 6:06 PM
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Senthoor: no, am not doing any calculations... am doing this because am manipulating the value for display purposes. What i wanna do is if I initialize the string variable with the said value and convert/parse it to double, i'd still get the same value... without the E in the value.

Maybe I'll try using BigDecimal and do some manipulations with it. Unless you can give me simpler options ;)

Thanks!

patoots

Posts: 6
Nickname: patoots
Registered: Oct, 2003

Re: double without the exponent Posted: Oct 15, 2003 6:19 PM
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Alex S: if I use long, the value would lose its precision... i still need the whole value with the decimal point.

Hmmm... interesting... I haven't used the DecimalFormat class... i'll try that one too :) super thanks!

Senthoorkumaran Punniamoorthy

Posts: 335
Nickname: senthoor
Registered: Mar, 2002

Re: double without the exponent Posted: Oct 15, 2003 8:10 PM
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I think the simpler solution is for you go with DecimalFormat class

Alex S

Posts: 27
Nickname: andu
Registered: Mar, 2003

Re: double without the exponent Posted: Oct 16, 2003 4:16 AM
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Read float not long!

Mea culpa.

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