Question

USING JAVA, PLEASE MAKE THIS AS SIMPLE AS POSSIBLE, THIS IS AN INTRODUCTORY JAVA COURSE

1. Design and implement a class called PairOfDice.

The class should include:

a. A non-default constructor, i.e. with parameters

b. A setter method for each instance data

c. A getter method for each instance data

d. A method roll() that rolls both dice

e. A toString() method that returns a string containing the colors of both dice, eg "Colors of both dice: Red,Blue "

f. A method pairSum that returns the current sum of the two die values. (in PairOfDice.java)

2. Write an application TestPairDice that uses the PairOfDice class to create a pair of dice. The application prints to the screen the sum of their face values. The program then rolls the pair of dice and prints to the screen the new sum of their face and the colors of both dice. (TestPairOfDice.java)

SAMPLE OUTPUT: Sum of face values before roll: 7

Sum of face values after roll: 6

Color of both dice: Red,Blue

Answer 1

Below is the solution:

public class PairOfDice {
   // declare the variable
   private int faceValue1; // die1 faceValue
   private int faceValue2; // die1 faceValue
   public String color; // string showing the color of the die

   // getter method
   public int getFaceValue1() {
       return faceValue1;
   }

   public int getFaceValue2() {
       return faceValue2;
   }

   public String getColor() {
       return color;
   }

   // setter method
   public void setFaceValue1(int faceValue1) {
       this.faceValue1 = faceValue1;
   }

   public void setFaceValue2(int faceValue2) {
       this.faceValue2 = faceValue2;
   }

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

   // roll two die
   public void roll() { // Rolls the die and returns the result
       faceValue1 = (int) (Math.random() * 6) + 1;
       faceValue2 = (int) (Math.random() * 6) + 1;
   }

   // return the pair of sum two die
   public int pairSum() {
       return faceValue1 + faceValue2;
   }

   // toString method
   @Override
   public String toString() {
       return color;
   }

   // default constructor
   public PairOfDice() {
       // set the default value of the die1 and die2
       this.faceValue1 = 4;
       this.faceValue2 = 3;
   }

   // non-default constructor, i.e. with parameters
   public PairOfDice(int faceValue1, int faceValue2) {
       super();
       this.faceValue1 = faceValue1;
       this.faceValue2 = faceValue2;
   }
}

public class TestPairOfDice {

   public static void main(String[] args) {
       PairOfDice die1 = new PairOfDice(); // create an object
       die1.setColor("Red"); // set the first die color to red
       System.out.println("Sum of face values before roll: " + die1.pairSum()); // print sum of the die
       PairOfDice die2 = new PairOfDice();
       die2.setColor("Blue"); // set the second die color to red
       die2.roll();
       System.out.println("Sum of face values after roll: " + die2.pairSum());
       System.out.println("Color of both dice:" + die1.toString() + "," + die2.toString());
   }
}

sample output 1:

Sum of face values before roll: 7
Sum of face values after roll: 6
Color of both dice:Red,Blue

sample output 2:

Sum of face values before roll: 7
Sum of face values after roll: 10
Color of both dice:Red,Blue