Thread: Dice Counter

Hi Im am basicly new to java and the these forums and i am having a problem here.
The thing is im still in high school and we started to learn java and we are doing a dice program and what we have to do is that we have to make it roll a pair of six sided die and we also have to make it count how much 1s, 2s, 3s, 4s, 5s, and 6s showed up out of said amount of rolls which is what i am having the problem with

heres my code:

import java.util.Random;
 
public abstract class DiceRoll {
 
    public static void main(String[] args) {
 
        int Dice1 = 0;
        int Dice2 = 0;
 
        Random generator = new Random();
 
        int counter = 0;
        int nOne = 0;
        int nTwo = 0;
        int nThree = 0;
        int nFour = 0;
        int nFive = 0;
        int nSix = 0;
 
        for(int i=0; i < 1200 ; i++) {
            Dice1 = (int)(Math.random()*6) + 1;
            Dice2 = (int)(Math.random()*6) + 1;
 
        } // end for
 
        System.out.println("There were " + nOne   + " ones,  " + nTwo   + " twos, "
            + nThree +      " threes, "    + nFour  + " fours, " + nFive  + " fives, and, "
            + nSix   +      " sixs "       + "were rolled out of ");
    } // end main
 
} // end class DiceRoll

Thank you for help

The problem is that you're assigning different numbers to Dice1 and Dice2 for each pass of the loop but you don't have any code to increment nOne, nTwo, nThree and the rest so when you print them out, they still have the original 0 value you've assigned. You need to put code in to test the value of Dice1 and Dice2 in each loop so if its 1 you do nOne++ and so on.

Can you explain it in a more newbier form and possible do an example. thx

In your loop you are assigning random numbers to Dice1 and Dice2 which works ok.

for(int i=0; i < 1200 ; i++) {
            Dice1 = (int)(Math.random()*6) + 1; 
            Dice2 = (int)(Math.random()*6) + 1;
 
        }

The problem is that the loop then runs again and you assign two different random numbers to Dice1 and Dice2 and the original numbers are lost.

You have the variables to count the number of times each number is rolled but these variables are never used. They are assigned a value of 0

        int nOne = 0;
        int nTwo = 0;
        int nThree = 0;
        int nFour = 0;
        int nFive = 0;
        int nSix = 0;

and then not used again so when you print them, they are still 0.

The best way I can see is either if statements or switch statements which can read the current value of Dice1 and add one to the right variable.

for(int i=0; i < 1200 ; i++) {
            Dice1 = (int)(Math.random()*6) + 1;
            if(Dice1==1)
           {
                  nOne++;
           }
           if(Dice1=2)
          {
                  nTwo++;
           }

and so on for Dice1 = 3, 4, 5 and 6
You could also use switch statements, link to a tutorial below.

Switch Statements

You would have to do the check the values for Dice2 as well.

oh ok Thx For the Help Anyways JavaPF