Probability in Java

Question

I was curious to know, how do I implement probability in Java? For example, if the chances of a variable showing is 1/25, then how would I implement that? Or any other proba

Answer 1

Generally you use a random number generator. Most of those return a number in the interval [0,1] so you would then check whether that number is <= 0.04 or not.

if( new Random().nextDouble() <= 0.04 ) {  //you might want to cache the Random instance
   //we hit the 1/25 ( 4% ) case.
}

Or

if( Math.random() <= 0.04 ) {
  //we hit the 1/25 ( 4% ) case.
}

Note that there are multiple random number generators that have different properties, but for simple applications the Random class should be sufficient.