Example bomb question in lecture slides.

import java.io.*;

import java.util.*;

// Displays a set of cities and simulates dropping a "bomb" on them.

public class Bomb {

public static void main(String[] args) throws FileNotFoundException {

Scanner input = new Scanner(new File("cities.txt"));

Point[] cities = readCities(input);

// drop the "bomb"

Scanner console = new Scanner(System.in);

Point bomb = new Point();

System.out.print("Blast site x? ");

bomb.x = console.nextInt();

System.out.print("Blast site y? ");

bomb.y = console.nextInt();

System.out.print("Blast radius? ");

int radius = console.nextInt();

boom( bomb , radius, cities);

}

public static Point[] readCities(Scanner input) {

int numCities = input.nextInt(); // first line = # of cities

Point[] cities = new Point[numCities];

for (int i = 0; i < cities.length; i++) {

cities[i] = new Point();

cities[i].x = input.nextInt(); // read city x/y from file

cities[i].y = input.nextInt();

}

return cities;

}

// Simulates dropping a bomb at the given location on the given cities.

public static void boom( Point bomb , int radius, Point[] cities ) {

for (int i = 0; i < cities.length; i++) {

int dx = cities[i].x - bomb.x;

int dy = cities[i].y - bomb.y;

double distance = Math.sqrt(dx * dx + dy * dy);

if (distance <= radius) {

System.out.println ("(" + cities[i].x + ", " + cities[i].y + ")");

}

}

}

}

1) Create a bomb java program in n-dimensional space based on given program.

a) Use arrays inside Point class.

b) Create constructors.

c) Use private fields, create getters and setters.

2) Create a Bomb program with using polar coordinates.

a) Use private fields.

b) Create a constructor accepting Cartesian coordinates. The constructor should convert Cartesian coordinates into polar.

(conversion of cartesian coordinates to polar: https://www.mathsisfun.com/polar-cartesian-coordinates.html

c) Create getters and setters which accept and returns Cartesian coordinates.