How to store and use coordinates

Question

I need to store 2d coordinates and use them in solving equations and pass them into methods. For example, I need to store the coordinates of a corner of a rectangle (5,10). Then I need to use that point and solve for certain variables in a equation ((5,10) = (0,0) + 2*x and solve for x). I would then need to pass x into a method and perform additional operations on that. How would I go about doing this? I tried searching around but did not get anything helpful.

Answer 1

kramish wrote:
BigDaddyLoveHandles wrote:
Point2D doesn't come with much functionality -- for example, it doesn't have any vector-like methods to add or subtract points or multiple them by a scalar. You'll have to do the math yourself.Surely (and I havent looked into this) the Java 3D libraries would have tonnes of classes for vector maths available?
Maybe you could look into them.True, but if all the OP is trying to do is the odd "pt1 - pt2" or "2*pt", he should just write the code:
public static Point2D plus(Point2D p1, Point2D p2) {
    return new Point2D.Double(p1.getX() + p2.getX(), p1.getY() + p2.getY());
}