Question

I need help with these Java programming assignements.

public class Die
{
//here you declare your attributes
private int faceValue;


//operations
//constructor -
public Die()
{
//body of constructor
faceValue=(int)(Math.random()*6)+1;//instead of 1, use random approach to generate it
}

//roll operation
public void roll()
{
faceValue=(int)(Math.random()*6)+1;
}
  
//add a getter method
public int getFaceValue()
{
return faceValue;
}
  
//add a setter method
public void setFaceValue(int value)
{
faceValue=value;
}
//add a toString() method
public String toString()
{
String result = Integer.toString(faceValue);

return result;
}

}

1.Modify the class Die presented above to include another instance data (string) called color to represent the color of a die.Add a getter/setter for this data.

2.. Implement a method comboDie that takes two dice parameters. The method returns a die with color the combination of both dice’ colors and face value the average of the dice’ facevalues. (Add this method to your MyMethods class)

Example: if first die is “blue” with facevalue=3 and second die is “red”with facevalue=5, the method returns a “blue-red” die with facevalue=4. Note.

Use the Die class presented above.

3. Using the Die class defined above, design and implement a class called PairOfDice, composed of two Die objects. Include methods to set and get each individual die, a method to roll the dice, a toString method that returns colors of both dice and a method pairSum that returns the current sum of the two die values.

4.Write an application TestPairOfDice that uses the PairOfDice class to create and roll a pair of dice 1000 times, counting the number of box cars (two sixes) that occur..

Answer 1

//Java code

public class Die
{
    //here you declare your attributes
    private int faceValue;
    private String color;

    //operations
//constructor -
    public Die()
    {
//body of constructor
        faceValue=(int)(Math.random()*6)+1;//instead of 1, use random approach to generate it
        color = "none";
    }

    //roll operation
    public void roll()
    {
        faceValue=(int)(Math.random()*6)+1;
    }

    //add a getter method

    public String getColor() {
        return color;
    }

    public int getFaceValue()
    {
        return faceValue;
    }

    //add a setter method
    public void setFaceValue(int value)
    {
        faceValue=value;
    }

    public void setColor(String color) {
        this.color = color;
    }

    public static String comboDie(Die d1, Die d2 )
    {
        int avg = (d1.faceValue+d2.faceValue)/2;
        return "\""+d1.color+"-"+d2.color+"\""+" die with facevalue = "+avg;
    }
    //add a toString() method
    public String toString()
    {
        String result = Integer.toString(faceValue);

        return result;
    }

}

//=========================

public class PairOfDice {
    private Die die1;
    private Die die2;

    //Constructor
    public  PairOfDice()
    {
        die1 = new Die();
        die2 = new Die();
    }
    //Overload Constructor

    public PairOfDice(Die die1, Die die2) {
        this.die1 = die1;
        this.die2 = die2;
    }

    //getters and setters

    public Die getDie1() {
        return die1;
    }

    public void setDie1(Die die1) {
        this.die1 = die1;
    }

    public Die getDie2() {
        return die2;
    }

    public void setDie2(Die die2) {
        this.die2 = die2;
    }
    public void roll()
    {
        die1.roll();
        die2.roll();
    }
    public int pairSum()
    {
        return die1.getFaceValue()+ die2.getFaceValue();
    }
    @Override
    public String toString() {
        return "Color of Dice1: "+die1.getColor()+", Color of Dice2: "+die2.getColor();
    }
}

//=========================

public class TestPairOfDice {
    public static void main(String[] args)
    {
        PairOfDice pairOfDice = new PairOfDice();
        Die die1 =new Die();
        die1.setColor("Red");
        Die die2 = new Die();
        die2.setColor("Blue");
        pairOfDice.setDie1(die1);
        pairOfDice.setDie2(die2);
        System.out.println(pairOfDice);
        int count =0;
        for (int i = 1; i <=1000 ; i++) {
            pairOfDice.roll();
            System.out.println("Die1: "+pairOfDice.getDie1()+", Die2: "+pairOfDice.getDie2());
            if(pairOfDice.getDie1().getFaceValue()==6
                && pairOfDice.getDie2().getFaceValue()==6)
                count++;
        }
        System.out.println("Number of box cars: "+count);
    }
}

//Output

Diel: 3, Die2: 3 Diel: 1, Die2: 3 Diel: 3, Die2: 1 Diel: 2, Die2: 4 Diel: 1, Die2: 6 Diel: 4, Die2: 1 Diel: 1, Die2: 5 Diel: 1, Die2: 3 Diel: 2, Die2: 1 Diel: 1, Die2: 5 Diel: 6, Die2: 3 Diel: 6, Die2: 1 Diel: 5, Die2: 6 Diel: 6, Die2: 2 Diel: 1, Die2: 2 Diel: 1, Die2: 4 Diel: 2, Die2: 2 Diel: 2, Die2: 3 Diel: 4, Die2: 1 Diel: 2, Die2: 3 Diel: 6, Die2: 5 Number of box cars: 29 Process finished with exit code 0

//If you need any help regarding this solution...... please leave a comment....... thanks