No problem, Lionheart =) Pass it on!
Computer Science Canada formatting... |
| Author: | lionheart [ Mon Jan 24, 2005 10:13 pm ] |
| Post subject: | formatting... |
im kinda a noob at java but is it possible to format without outputting? for example... String mortStr = Double.toString (mortgage); if a large number was inputted and calculations occured the string would have alot of decimals.. so im wondering if there is a way to format or change it so that i around 2 decimal places? Math.round works... but it would be easier for me if i could have 2 decimal places |
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| Author: | Hikaru79 [ Mon Jan 24, 2005 10:17 pm ] | ||
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This is a neat trick. You want it to two decimal places? While it's still a double, multiply it by 100, round it, and divide it by 100. For example: Your number is 64.56945 Multiply by 100 = 6456.945 Round to nearest whole number = 6457 Divide by 100 = 64.57 And voila! 64.57 is what you would normally have gotten from rounding to two. In java, this looks like
That should work =) Remember, comp sci is all about creative problem solving ^_^ |
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| Author: | lionheart [ Mon Jan 24, 2005 10:20 pm ] |
| Post subject: | Yea but... |
see the thing is .... if it was a number lik 23232.23232323223 the decimals are a result of a division or multiplication of a decimal, so then even if you multiply by 100 or divide... then it will still have 2323223.232323 so i want to "get rid" of the extra decimals actaully wait.. |
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| Author: | lionheart [ Mon Jan 24, 2005 10:26 pm ] |
| Post subject: | yea that actually did... |
that did work... thanks a million hikaru i ve spent so long on this damn final project.... |
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| Author: | Hikaru79 [ Mon Jan 24, 2005 10:27 pm ] |
| Post subject: | |
No problem, Lionheart =) Pass it on! |
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| Author: | lionheart [ Mon Jan 24, 2005 10:46 pm ] |
| Post subject: | well is it.. |
what if its .... .say... 1234567.0 multiply..... its 123456700 divide it still is 1234567.0 the reason it so impotant, is beause im trying to create a chart... |
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| Author: | Neo [ Mon Jan 24, 2005 10:53 pm ] |
| Post subject: | Re: well is it.. |
lionheart wrote: what if its .... .say...
1234567.0 multiply..... its 123456700 divide it still is 1234567.0 the reason it so impotant, is beause im trying to create a chart... You said you needed your numbers rounded to two decimal places, and since that number is already rounded, couldn't you just add another zero to the end of that number? |
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| Author: | lionheart [ Mon Jan 24, 2005 10:59 pm ] |
| Post subject: | but... |
but if the number was something like... 1234567.192 and you added ... .12345670.192 then when you multitply round and divide.. you would get rid of the las number and aadd a uneeded 0 |
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| Author: | wtd [ Tue Jan 25, 2005 12:23 am ] | ||||
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A better solution would be to use a DecimalFormat object. First you need to import java.text.
Then you create a DecimalFormat object.
The reference page. |
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