Probability.java

import java.util.concurrent.ThreadLocalRandom;

public class Probability {
    
    public static void main(String[] args){
        
        if(args.length != 2){
            System.out.println("java Probability <Samples> <Probability percentage>");
            System.exit(0);
        }

        int test = Integer.parseInt(args[1]);
        
        if(test > 100){
            System.out.println("Probability Percentage cannot be greater than 100%");
            System.exit(0);
        }

        int samples = Integer.parseInt(args[0]);
        int min = 1;
        int max = 100;
        
        int counter = 0;
        for(int i=0; i<=samples; i++){
            int random = ThreadLocalRandom.current().nextInt(min, max + 1);
            if((random>0)&&(random<=test)){
                counter++;
            }
        }
        double mean = 1.0*counter/samples;
        // System.out.println("Mean: "+mean);
        System.out.println("Mean deviation: "+Math.abs((1.0*test/samples)-mean));
        System.out.println("Mean percentage: "+100*mean+"%");
        
    }
}