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How to generated random number from lognormal distribution with known parameters mu and sigma?

I have a known parameters mu and sigma for lognormal distribution, and I don not know the lower and upper bound or interval for the random variable. I know (Random.nextGaussian() * sigma ) + mu used to generat random variat for normal distribution with mu and sigma parameters. However, how can I generate a random number from the lognormal distribution with known mu and sigma using Java? Thank you.

Solution

  • Use apache commons math to create a LogNormalDistribution. 

        Double mu = 0.0;
    Double sigma = 0.0;
    LogNormalDistribution logNormal = new LogNormalDistribution(sigma, mu);
    System.out.println("Random Value : " + logNormal.sample());