Question

Include an unfair or biased dice. dice doesnt have equal opportunities (in regular dice it is 1/6) DONT implement unbiased roll, reorganize the program to include BiasedDicePair class, add the new class to this project.

PairOfDiceDriver.java

public class PairOfDiceDriver {

   public static void main(String[] args) {
       PairOfDice obj = new PairOfDice();
       obj.roll();
       System.out.println(obj);
   }

}

PairOfDice.java

public class PairOfDice {
   private int face1, face2;
   public PairOfDice() {
      
   }
   public void roll() {
       face1 = (int)(Math.random()* 6 + 1);
       face2 = (int)(Math.random()* 6 + 1);
   }
   public int getSum() {
       return face1 + face2;
   }
   public String toString(){
       return face1+" : "+face2+" = "+getSum();
   }
}

Answer 1

class PairOfDice {
    private int face1, face2;

    public PairOfDice() {

    }

    public void roll() {
        face1 = (int) (Math.random() * 6 + 1);
        face2 = (int) (Math.random() * 6 + 1);
    }

    public int getSum() {
        return face1 + face2;
    }

    public String toString() {
        return face1 + " : " + face2 + " = " + getSum();
    }
}

class BiasedDicePair {
    private int face1, face2;

    public BiasedDicePair() {

    }

    public void roll() {
        // suppose the rolls have below possibilities
        // 1 => 20%
        // 2 => 20%
        // 3 => 10%
        // 4 => 20%
        // 5 => 20%
        // 6 => 10%

        int x1 = (int) (Math.random() * 10);
        if(x1 < 2) {
            x1 = 1;
        } else if(x1 < 4) {
            x1 = 2;
        } else if(x1 < 5) {
            x1 = 3;
        } else if(x1 < 7) {
            x1 = 4;
        } else if(x1 < 9) {
            x1 = 5;
        } else {
            x1 = 6;
        }
        int x2 = (int) (Math.random() * 10);
        if(x2 < 2) {
            x2 = 1;
        } else if(x2 < 4) {
            x2 = 2;
        } else if(x2 < 5) {
            x2 = 3;
        } else if(x2 < 7) {
            x2 = 4;
        } else if(x2 < 9) {
            x2 = 5;
        } else {
            x2 = 6;
        }

        face1 = x1;
        face2 = x2;
    }

    public int getSum() {
        return face1 + face2;
    }

    public String toString() {
        return face1 + " : " + face2 + " = " + getSum();
    }



}

public class PairOfDiceDriver {
    public static void main(String[] args) {
        BiasedDicePair obj = new BiasedDicePair();
        obj.roll();
        System.out.println(obj);
    }
}

Hi. please find the answer above.. i have given comments so that it is very easy for you to understand the flow. In case of any doubts, please ask in comments. If the answer helps you, please upvote. Thanks!