Java Algorithms How to - Random Roll Dice

• Back to Random  ↑

Question

We would like to know how to random Roll Dice.

Answer

import java.util.Random;
/*  w w w  .  j  a va  2  s . c om*/
public class Main {
  public static void main(String[] args) {
    System.out.println("Total is: " + Dice.rollDice(3, 6));
  }
}
class Dice {
  public static int rollDice(int number, int nSides) {
    int num = 0;
    int roll = 0;
    Random r = new Random();
    if (nSides >= 3) {
      for (int i = 0; i < number; i++) {
        roll = r.nextInt(nSides) + 1;
        System.out.println("Roll is:  " + roll);
        num = num + roll;
      }
    } else {
      System.out.println("Error num needs to be from 3");
    }
    return num;
  }
}

The code above generates the following result.

• Back to Random  ↑