how prevent to recurrence of two random numbers? [duplicate]

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• New Random Number Not Generating 1 answer

please i have two TextView in android studio activity, and those Text has a Random number i need to multiple and get result, but while get random number, the duplicate of same number occur, how i can prevent that? this my code:

  if (Integer.parseInt(num1.text.toString()) * Integer.parseInt(num2.text.toString())
                == Integer.parseInt(result.text.toString())) {
            Toast.makeText(applicationContext, "right", Toast.LENGTH_LONG).show()

and my function use to generate random number is :

   private  fun randomNumber():Int{
    val rand = Random();
    return rand.nextInt(10) +1
}