Generate a random boolean with given probability [duplicate]

Question

I am writing java code to solve a problem with simulated annealing method. I need a method to generate a random true only with probability exp(a/b) where a and b are given parameters.

Thanks.

Answer 1

Assuming that a/b is the percentage probability of returning true:

public boolean exp(double probabilityTrue)
{
    return Math.random() >= 1.0 - probabilityTrue;
}