public class GenerateRandom
{
   public static void main(String[] args)
   {
      double d = Math.random(); // 0 <= d < 1
      
      int num = (int) (100 * d); // 0 <= num < 100
      
      num = num + 1; // 1 <= num <= 100
      
      System.out.println("Random number between 1 and 100 is " + num);
   }
}