public RelativeLocator(double relativeX, double relativeY) { this.relativeX = relativeX; this.relativeY = relativeY;
public RelativeLocator() { relativeX = 0.0; relativeY = 0.0;
    public RelativeLocator(double relativeX, double relativeY) {        this.relativeX = relativeX;        this.relativeY = relativeY;    }