You will create a basic class for representing a 2D point. Your class will need

Question

You will create a basic class for representing a 2D point. Your class will need to store the x and y coordinates of the point and provide the following methods: Constructors: Your Point2D object should be immutable, that is, once you create a Point2D object, there should be no way to change the points location. To compute the distance between two points (x1, y1) and (x2, y2), use the following equation: Root (x1-x2)^2+(y1-y2)^2 In your main method, write a program that tests your Point2D class by instantiating points, calling static methods versus instance methods and printing t heir results to the console. You do not need to get input from the user but come up with good test cases.

Explanation / Answer

import java.util.Scanner;

//distance = square root of [(x2-x1)squared + (y2-y1)squared]

public class PointDistance

{

    public static void main(String[] args)

    {  

         

        double distance(double x1, double y1, double x2, double y2)

            {

            return math.sqrt((x1-x2)(x1-x2) + (y1-y2)(y1-y2));

             

                         }

        double x1, x2, y, y2;

        double distance;

      

         

        Scanner scan = new Scanner (System.in);

         

        System.out.println("Enter the x coordinate for point 1: ");

        x1 = scan.nextDouble();

         

        System.out.println("Enter the y coordinate for point 1: ");

        y1 = scan.nextDouble();

         

        System.out.println("Enter the x coordinate for point 2: ");

        x2 = scan.nextDouble();

         

        System.out.println("Enter the y coordinate for point 2: ");

        y2 = scan.nextDouble();

         

        distance = distance(x1,y1,x2,y2);

         

        System.out.println("The distance between the two points is " + distance + " .");

         

    }

     

}

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