Java 7-ification of renderRay

maybe.java

    private Polygon renderRay( Point mp, Set<Point> points, Set<Segment> segmentSet ) {
        Polygon lightPoly = new Polygon();
        List<Point> beams = new ArrayList<>();
        List<Double> raypoints = new ArrayList<>();
        for( Point p : points ) {
            double atan = Math.atan2(p.getY() - mp.getY(), p.getX() - mp.getX());
            raypoints.add(atan - 0.001);
            raypoints.add(atan);
            raypoints.add(atan + 0.001);
        }
        Collections.sort(raypoints);
        for(double a : raypoints) {
            Segment s = new Segment(mp, new Point(mp.getX() + Math.cos(a), mp.getY() + Math.sin(a)));
            Intersection i = Intersection.NONE ;
            for(Segment ss : segmentSet) {
                Intersection j = Intersection.intersect(s, ss);
                if(j.getDistance() < i.getDistance()) {
                    i = j;
                }
            }
            if(i != Intersection.NONE) {
                beams.add(i.getPoint());
            }
        }
        for(Point beam : beams) {
            lightPoly.getPoints().add(beam.getX());
            lightPoly.getPoints().add(beam.getY());
        }
        lightPoly.setFill( new RadialGradient( 0, .5, mp.getX(), mp.getY(),
                400, false, CycleMethod.NO_CYCLE, new Stop( 0, Color.valueOf( "#FFFFFF55" ) ),
                new Stop( 1, Color.valueOf( "#33333300" ) ) ) );
        lightPoly.setBlendMode( BlendMode.SOFT_LIGHT );
        return lightPoly ;
    }