[java] Probabilty Problem
Author
While doing work on a game, I came across a problem where I needed to a boolean that was true only 1 millionth of the time.
Does anyone know of any Java code or classes available to allow me to do that?
Quote:Original post by Nomad010
While doing work on a game, I came across a problem where I needed to a boolean that was true only 1 millionth of the time.
Does anyone know of any Java code or classes available to allow me to do that?
"I needed to a boolean"
What do you mean by this? It might have just been a typo, but please fix it so we know what you mean and can help.
Call Java's random function, and if the return value is 1 million, set your bool to true. Otherwise, set it to false.
Author
Java's Math.random function only produces a random number from 0.000 to 1.000. There are only 1001 possibilities.
Quote:Original post by Nomad010
Java's Math.random function only produces a random number from 0.000 to 1.000. There are only 1001 possibilities.
Why do you think that. It says nothing about this in the javadoc. I don't know how many bits of precision you get, but it is defenitly more than you need.
Don't use Math.random, use java.util.Random, and call nextInt(). The code looks like this:
ps. floating point numbers do indeed have way more than 1001 possible values
//create the random, note how we seed itRandom r = new Random(System.currentTimeMillis());// ....boolean bOneInAMillion = (r.nextInt() % 1000000) == 0;ps. floating point numbers do indeed have way more than 1001 possible values
Author
Oops. I was confusing the Math.random() function for another class. *cough*.
Ratings++ for tombr and Thex0.
Ratings++ for tombr and Thex0.
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