Java Random number but not zero

Question

int num = 10;
Random rand = new Random();
int ran = rand.nextInt(num);
if (ran==0){          
  ran= ran+1;
}
System.out.println("random : "+ran);  

This is what i have coded so far, is there a better way to do this? I feel that this is hard coding when random is 0, I added 1.

Answer 1

The problem with that code is that 1 is twice as likely as other numbers (as your effective result is 1 when nextInt() returns 0 or 1).

The best solution is to just always add 1 and request random numbers from a smaller range:

int rnd = rand.nextInt(num - 1) + 1;

Answer 2

I guess you are trying to get a random number between 1 and 'num'.

a more generic way can be :

int Low = 1;
int High = 10;
int R = r.nextInt(High-Low) + Low;

This gives you a random number in between 1 (inclusive) and 10 (exclusive). ( or use High=11 for 10 inclusive)