CODEWITHSUNDEEP
javaoop
SunnyBoiz
SunnyBoiz

Reputation: 594

Java getter with Parameter?

I am new to Java. I know about some core basics of Java such as setter and getter and recently came across a getter with a parameter (not sure if it is correct way of calling it):

public double getDistance(Point p)
{
   // what is inside here? Usually without the "Point p" I simply put "return distance;"
}

This method belongs to a class called Point and it is meant to get the calculation of distance from a private method in the same class.

I will appreciate if someone can enlighten me on the getter "parameter" and how I can apply the return in this method.

Thank you.

EDIT: Added the private calculation method

// Compute distance
private double distance(Point p)
{   
    double xx;
    double yy;
    double r;

    xx = this.x - p.x;
    yy = this.y - p.y;

    r = Math.sqrt(nx * nx + ny * ny);

    return r;
}

Upvotes: 0

Views: 2874

Answers (2)

WJS
WJS

Reputation: 40062

Why not use Point2D? It has built-in methods for computing distances from a supplied point to some point you already have.

      Point2D pt = new Point2D.Double(10,20);
      double distance = pt.distance(new Point2D.Double(20,30));
      System.out.println(distance);

Check it out at java.awt.geom.Point2D

Upvotes: 0

Elliott Frisch
Elliott Frisch

Reputation: 201477

I think a simple argument rename will make things clear, you want to calculate the distance between two-points. Specifically, this point and that point. Assuming you have double x and y coordinates in each Point that might look like,

public double getDistance(Point that) {
    double tmpX = that.x - this.x;
    double tmpY = that.y - this.y;
    return Math.sqrt((tmpX * tmpX) + (tmpY * tmpY));
}

Upvotes: 1

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