Substring double values?

I'm trying to substring a double value but I tried .substring but i believe that's only for strings.

And I'd also like to round the numbers up a tiny bit.

for example

4.079691454585337

rounded up to 4.08 without showing the rest of the numbers.

Could anyone put me in the right direction for this. Thanks a bunch!

You can do this any number of ways, but first of all, you are right, subString is for Strings only. Now as to your problem, it can be solved with a DecimalFormat object or the static String method String.format(...).

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I tried .substring but i believe that's only for strings.

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You can see what methods a class has by reading the API doc for that class.

If you are printing the numbers and want to control what is printed, see the printf() method.

I'm not sure what I'm doing wrong. I've checked the printf class and followed a tutorial but I get a problem with the script.

Here's my code:

Code:

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System.out.printf("%.1f \t %f", year, price);

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Is there a reason why there comes with an error with this? I can't see why, I've followed the tutorial and it seems correct.

Any pointers would be greatly appreciated!

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Is there a reason why there comes with an error with this

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You forgot to post the full text of the error message.

Crystal ball says either year or price is not a floating point number. Which leads me to ask why is year a floating point number? This year is 2011 not 2011.56.