Method to Get distance between two points

Tue Oct 26, 2010 1:35 am

Method to get distance between to points in 2d space:

A public method named distanceTo that accepts a parameter of type Point and returns a double value
representing the distance between the two points (i.e., between the Point object on which the method
was called and the other Point object that was passed as a parameter to the method). Recall that to
compute the distance between two points in 2D space you must:

Find the dierence between the two x-coordinates
Compute the square of that dierence
Find the dierence between the two y-coordinates
Compute the square of that dierence
Add those two squares together
Take the square root of the result

and.... so far I have this

Code:: /** * Changes the distance between the two points */ public void distanceTo(double xPosition, double yPosition) { }

Im at a lost and don't know where to start any help would be great.

Wed Nov 03, 2010 3:57 pm

one possible solution would be:

Code:: import java.lang.Math; public class xPoint { /** * Makes the class executable */ public static void main(String[] args) { xPoint p1 = new xPoint(5, 7); xPoint p2 = new xPoint(8, 4); System.out.println("Distance = " + p1.distanceTo(p2)); } /** * Private member containing the x coordinate */ private double x; /** * Private member containing the y coordinate */ private double y; /** * Method to compute the distance to another xPoint instance * @param xPosition * @param yPosition */ public xPoint(double xPosition, double yPosition) { x = xPosition; y = yPosition; } /** * Method to compute the distance to another xPoint instance. * @param other Instance to compute distance to. * @return Distance between the current instance of xPoint and other. */ public double distanceTo(xPoint other) { return Math.sqrt(Math.pow(x - other.x, 2) + Math.pow(y - other.y, 2)); } }

Executing the program results in this output:

Code:: Distance = 4.242640687119285

Best regards
apeter

Method to Get distance between two points

Method to Get distance between two points

Re: Need Help with Java Source code.