import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

public class CanvasTranslateBug extends Application {
    public static void main(String argv[]) {
        launch(argv);
    }

    @Override
    public void start(Stage stage) {
        Group root = new Group();
        Canvas cv = new Canvas(400, 400);
        root.getChildren().add(cv);

        GraphicsContext gc = cv.getGraphicsContext2D();
        gc.setFill(Color.WHITE);
        gc.fillRect(0, 0, 400, 400);
        gc.setFill(Color.BLUE);
        gc.setStroke(Color.GREEN);
        gc.setLineWidth(10);
        gc.scale(2, 2);
        for (int x = 0; x < 200; x += 80) {
            for (int y = 0; y < 200; y += 80) {
                draw(gc, x, y);
            }
        }

        Scene scene = new Scene(root);
        stage.setScene(scene);
        stage.show();
    }

    static double xPoints[] = { 0, 30, 0, 30 };
    static double yPoints[] = { 0, 0, 30, 30 };
    public void draw(GraphicsContext gc, double x, double y) {
        gc.save();
        gc.translate(x, y);
        gc.fillOval(10, 0, 30, 30);
        gc.strokeOval(10, 0, 30, 30);
        gc.translate(0, 40);
        gc.fillPolygon(xPoints, yPoints, 4);
        gc.strokePolygon(xPoints, yPoints, 4);
        gc.translate(40, 0);
        gc.strokePolyline(xPoints, yPoints, 4);
        gc.restore();
    }
}