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Tag: floating-point

Generating a random double in an exclusive range

I’m trying to generate a random floating point number between but not including it’s lower and upper bounds (lower, upper). I’ve seen a lot of questions about generating a number from, and including it’s lower bound up to, but not including it’s upper bound [lower, upper), but that’s not what I’m after. I’ve come up with two “solutions” to the

C compatible printf output for Java

I’d want to convert float/double to string, in Java and C, such that the outputs are both consistent and user friendly. By “user friendly”, I mean the string should be human readable and sound: a maximum number of significant digits, and some automatic switching to scientific notation when appropiate (the double could span all the valid range). By “consistent” I

Prevent round off in String.format(“%.2f”, doubleValue) in Java

How do I prevent String.format(“%.2f”, doubleValue); from rounding off (round half up algorithm) instead of just truncating it? e.g. after formatting, I just want to discard the last digit, I know there are other ways to do this, I just want to know if this is possible using the String.format. Answer You can always set the rounding mode: http://java.sun.com/javase/6/docs/api/java/math/RoundingMode.html and

When should I use the “strictfp” keyword in java?

I’ve looked up what this does, but does anyone actually have an example of when you would use the strictfp keyword in Java? Has anyone actually found a use for this? Would there be any side-effects of just putting it on all my floating point operations? Answer Strictfp ensures that you get exactly the same results from your floating point

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