Question

Write a class named DartSector. The constructor should accept a sector number and position {Single, Double, Treble, Outer & Inner} represented with the integers 1 – 5 respectively. The class should have 3 methods: • getSectorColor – method should return the pocket’s color (as a String) • singleThrow – method should generate 2 random numbers; one in the range (1..20) and another (1..5); and return the score for the throw. • throwThree – method should generate 3 sets of random numbers, as above; and return the sum of the scores for these three throws. Demonstrate the class in a program that asks the user to select the number of throw desired (1 or 3, validating user input is one of these), then calls the appropriate method to generate those throws; if a single spin, gives the resulting sector and color on the monitor; if 3 spins, uses a loop to display all the sectors and colors, each throw on a separate line.

Answer 1

import java.util.Scanner;

public class DartSector {

    private int sector, position;


    public DartSector(int sector, int position) {
        this.sector = sector;
        this.position = position;
    }

    public String getSectorColor() {
        // derive the color from sector number
        return "";
    }

    public String getPosition() {
        String pos[] = {"", "Single", "Double", "Treble", "Outer", "Inner"};
        return pos[position];
    }

    public int singleThrow() {
        int r1 = (int) (Math.random() * 20 + 1);
        int r2 = (int) (Math.random() * 5 + 1);
        System.out.println("(" + r1 + "," + r2 + ")");
        return r1 + r2;
    }
    public int throwThree() {
        int score = singleThrow();
        score += singleThrow();
        score += singleThrow();
        return score;
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        System.out.println("Enter number of throws: ");
        int t = in.nextInt();

        while(t != 1 && t != 3) {
            System.out.println("Invalid moves.");
            System.out.println("Enter number of throws: ");
            t = in.nextInt();
        }

        DartSector sector = new DartSector(1, 2);
        if(t == 1) {
            sector.singleThrow();
        } else {
            sector.throwThree();
        }

        in.close();
    }

}

I do not understand what is a sector and how to find colors, but the above code should help you.. Still in case of issue, ask in comments.